(command.CommandList
  children: [
    (command.If
      if_kw: <Id.KW_If if>
      arms: [
        (IfArm
          keyword: <Id.KW_If if>
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (command.Simple
                      blame_tok: <Id.Lit_LBracket '['>
                      more_env: []
                      words: [
                        {<Id.Lit_LBracket '['>}
                        {($ Id.VSub_Pound '#')}
                        {<-eq>}
                        {<0>}
                        {<Id.Lit_RBracket ']'>}
                      ]
                      redirects: []
                      do_fork: T
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          then_kw: <Id.KW_Then then>
          action: [
            (command.Simple
              blame_tok: <cat>
              more_env: []
              words: [{<cat>}]
              redirects: [
                (Redir
                  op: <Id.Redir_DLess '<<'>
                  loc: (redir_loc.Fd fd:0)
                  arg: 
                    (redir_param.HereDoc
                      here_begin: {<EOF>}
                      here_end_tok: <Id.Undefined_Tok ''>
                      stdin_parts: [
                        <'Usage: '>
                        ($ Id.VSub_Number 0)
                        <' temperature[F|C|K]\n'>
                        <'where the suffix:\n'>
                        <'   F    indicates input is in Fahrenheit (default)\n'>
                        <'   C    indicates input is in Celsius\n'>
                        <'   K    indicates input is in Kelvin\n'>
                      ]
                    )
                )
                (Redir op:<Id.Redir_GreatAnd '>&'> loc:(redir_loc.Fd fd:1) arg:{<2>})
              ]
              do_fork: T
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          spids: [14 28]
        )
      ]
      else_action: []
      fi_kw: <Id.KW_Fi fi>
      redirects: []
    )
    (command.ShAssignment
      left: <Id.Lit_VarLike 'unit='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike 'unit='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'unit='> name:unit)
          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (CommandSub
                  left_token: <Id.Left_DollarParen '$('>
                  child: 
                    (command.Pipeline
                      children: [
                        (command.Simple
                          blame_tok: <echo>
                          more_env: []
                          words: [{<echo>} {($ Id.VSub_Number 1)}]
                          redirects: []
                          do_fork: T
                        )
                        (command.Simple
                          blame_tok: <sed>
                          more_env: []
                          words: [{<sed>} {<-e>} {(SQ <'s/[-[:digit:]]*//g'>)}]
                          redirects: []
                          do_fork: T
                        )
                        (command.Simple
                          blame_tok: <tr>
                          more_env: []
                          words: [{<tr>} {(SQ <'[:lower:]'>)} {(SQ <'[:upper:]'>)}]
                          redirects: []
                          do_fork: T
                        )
                      ]
                      ops: [<Id.Op_Pipe _> <Id.Op_Pipe _>]
                    )
                  right: <Id.Eof_RParen _>
                )
              )
            }
        )
      ]
      redirects: []
    )
    (command.ShAssignment
      left: <Id.Lit_VarLike 'temp='>
      pairs: [
        (AssignPair
          left: <Id.Lit_VarLike 'temp='>
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'temp='> name:temp)
          op: assign_op.Equal
          rhs: 
            {
              (DQ 
                (CommandSub
                  left_token: <Id.Left_DollarParen '$('>
                  child: 
                    (command.Pipeline
                      children: [
                        (command.Simple
                          blame_tok: <echo>
                          more_env: []
                          words: [{<echo>} {($ Id.VSub_Number 1)}]
                          redirects: []
                          do_fork: T
                        )
                        (command.Simple
                          blame_tok: <sed>
                          more_env: []
                          words: [{<sed>} {<-e>} {(SQ <'s/[^-[:digit:]]*//g'>)}]
                          redirects: []
                          do_fork: T
                        )
                      ]
                      ops: [<Id.Op_Pipe _>]
                    )
                  right: <Id.Eof_RParen _>
                )
              )
            }
        )
      ]
      redirects: []
    )
    (command.Case
      case_kw: <Id.KW_Case case>
      to_match: 
        (case_arg.Word
          w: 
            {
              (BracedVarSub
                left: <Id.Left_DollarBrace '${'>
                token: <Id.VSub_Name unit>
                var_name: unit
                suffix_op: (suffix_op.Unary op:<Id.VTest_ColonEquals _> arg_word:{<F>})
                right: <Id.Right_DollarBrace '}'>
              )
            }
        )
      arms_start: <Id.KW_In in>
      arms: [
        (CaseArm
          left: <F>
          pattern: (pat.Words words:[{<F>}])
          middle: <Id.Right_CasePat _>
          action: [
            (command.ShAssignment
              left: <Id.Lit_VarLike 'farn='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'farn='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'farn='> name:farn)
                  op: assign_op.Equal
                  rhs: {(DQ ($ Id.VSub_DollarName temp))}
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'cels='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'cels='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'cels='> name:cels)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2;('> ($ Id.VSub_DollarName farn) <' - 32) / 1.8'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'kelv='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'kelv='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'kelv='> name:kelv)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2;'> ($ Id.VSub_DollarName cels) <' + 273.15'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
          ]
          right: <Id.Op_DSemi _>
        )
        (CaseArm
          left: <C>
          pattern: (pat.Words words:[{<C>}])
          middle: <Id.Right_CasePat _>
          action: [
            (command.ShAssignment
              left: <Id.Lit_VarLike 'cels='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'cels='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'cels='> name:cels)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_DollarName temp)}
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'kelv='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'kelv='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'kelv='> name:kelv)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2;'> ($ Id.VSub_DollarName cels) <' + 273.15'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'farn='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'farn='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'farn='> name:farn)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2;(1.8 * '> ($ Id.VSub_DollarName cels) <') + 32'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
          ]
          right: <Id.Op_DSemi _>
        )
        (CaseArm
          left: <K>
          pattern: (pat.Words words:[{<K>}])
          middle: <Id.Right_CasePat _>
          action: [
            (command.ShAssignment
              left: <Id.Lit_VarLike 'kelv='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'kelv='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'kelv='> name:kelv)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_DollarName temp)}
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'cels='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'cels='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'cels='> name:cels)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2; '> ($ Id.VSub_DollarName kelv) <' - 273.15'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
            (command.ShAssignment
              left: <Id.Lit_VarLike 'farn='>
              pairs: [
                (AssignPair
                  left: <Id.Lit_VarLike 'farn='>
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'farn='> name:farn)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ 
                        (CommandSub
                          left_token: <Id.Left_DollarParen '$('>
                          child: 
                            (command.Pipeline
                              children: [
                                (command.Simple
                                  blame_tok: <echo>
                                  more_env: []
                                  words: [
                                    {<echo>}
                                    {(DQ <'scale=2; (1.8 * '> ($ Id.VSub_DollarName cels) <') + 32'>)}
                                  ]
                                  redirects: []
                                  do_fork: T
                                )
                                (command.Simple
                                  blame_tok: <bc>
                                  more_env: []
                                  words: [{<bc>}]
                                  redirects: []
                                  do_fork: T
                                )
                              ]
                              ops: [<Id.Op_Pipe _>]
                            )
                          right: <Id.Eof_RParen _>
                        )
                      )
                    }
                )
              ]
              redirects: []
            )
          ]
          right: <Id.Op_DSemi _>
        )
        (CaseArm
          left: <Id.Lit_Star '*'>
          pattern: (pat.Words words:[{<Id.Lit_Star '*'>}])
          middle: <Id.Right_CasePat _>
          action: [
            (command.Simple
              blame_tok: <echo>
              more_env: []
              words: [{<echo>} {(DQ <'Given temperature unit is not supported'>)}]
              redirects: []
              do_fork: T
            )
            (command.ControlFlow keyword:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
        )
      ]
      arms_end: <Id.KW_Esac esac>
      redirects: []
    )
    (command.Simple
      blame_tok: <echo>
      more_env: []
      words: [{<echo>} {(DQ <'Fahrenheit = '> ($ Id.VSub_DollarName farn))}]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <echo>
      more_env: []
      words: [{<echo>} {(DQ <'Celsius    = '> ($ Id.VSub_DollarName cels))}]
      redirects: []
      do_fork: T
    )
    (command.Simple
      blame_tok: <echo>
      more_env: []
      words: [{<echo>} {(DQ <'Kelvin     = '> ($ Id.VSub_DollarName kelv))}]
      redirects: []
      do_fork: T
    )
    (command.ControlFlow keyword:<Id.ControlFlow_Exit exit> arg_word:{<0>})
  ]
)