(command.CommandList
  children: [
    (C {(Id.Lit_Other ':')} 
      {
        (SQ 
          (Token
            id: Id.Lit_Chars
            val: 'This file is in the public domain, so clarified as of'
            span_id: 7
          )
        )
      }
    )
    (C {(Id.Lit_Other ':')} 
      {(SQ (Token id:Id.Lit_Chars val:'2006-07-17 by Arthur David Olson.' span_id:13))}
    )
    (command.Case
      to_match: {($ Id.VSub_Pound '$#') (-) ($ Id.VSub_Number '$1')}
      arms: [
        (case_arm
          pat_list: [
            {(2-)}
            {(2-0) (Id.Lit_Star '*')}
            {(2-) (Id.Lit_Star '*') (Id.Lit_LBracket '[') (Id.KW_Bang '!') (0-9) (Id.Lit_RBracket ']') 
              (Id.Lit_Star '*')
            }
          ]
          action: [
            (command.Simple
              words: [{(echo)} {(DQ ($ Id.VSub_Number '$0') (': wild year: ') ($ Id.VSub_Number '$1'))}]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:49)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Exit val:exit span_id:53)
              arg_word: {(1)}
            )
          ]
          spids: [26 38 57 -1]
        )
      ]
    )
    (command.Case
      to_match: {($ Id.VSub_Pound '$#') (-) ($ Id.VSub_Number '$2')}
      arms: [
        (case_arm
          pat_list: [{(2-even)}]
          action: [
            (command.Case
              to_match: {($ Id.VSub_Number '$1')}
              arms: [
                (case_arm
                  pat_list: [{(Id.Lit_Star '*') (Id.Lit_LBracket '[') (24680) (Id.Lit_RBracket ']')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:88)
                      arg_word: {(0)}
                    )
                  ]
                  spids: [82 86 92 -1]
                )
                (case_arm
                  pat_list: [{(Id.Lit_Star '*')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:98)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [95 96 102 -1]
                )
              ]
            )
          ]
          spids: [71 72 107 -1]
        )
        (case_arm
          pat_list: [{(2-nonpres)} {(2-nonuspres)}]
          action: [
            (command.Case
              to_match: {($ Id.VSub_Number '$1')}
              arms: [
                (case_arm
                  pat_list: [
                    {(Id.Lit_Star '*') (Id.Lit_LBracket '[') (02468) (Id.Lit_RBracket ']') 
                      (Id.Lit_LBracket '[') (048) (Id.Lit_RBracket ']')
                    }
                    {(Id.Lit_Star '*') (Id.Lit_LBracket '[') (13579) (Id.Lit_RBracket ']') 
                      (Id.Lit_LBracket '[') (26) (Id.Lit_RBracket ']')
                    }
                  ]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:140)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [123 138 144 -1]
                )
                (case_arm
                  pat_list: [{(Id.Lit_Star '*')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:150)
                      arg_word: {(0)}
                    )
                  ]
                  spids: [147 148 154 -1]
                )
              ]
            )
          ]
          spids: [110 113 159 -1]
        )
        (case_arm
          pat_list: [{(2-odd)}]
          action: [
            (command.Case
              to_match: {($ Id.VSub_Number '$1')}
              arms: [
                (case_arm
                  pat_list: [{(Id.Lit_Star '*') (Id.Lit_LBracket '[') (13579) (Id.Lit_RBracket ']')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:179)
                      arg_word: {(0)}
                    )
                  ]
                  spids: [173 177 183 -1]
                )
                (case_arm
                  pat_list: [{(Id.Lit_Star '*')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:189)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [186 187 193 -1]
                )
              ]
            )
          ]
          spids: [162 163 198 -1]
        )
        (case_arm
          pat_list: [{(2-uspres)}]
          action: [
            (command.Case
              to_match: {($ Id.VSub_Number '$1')}
              arms: [
                (case_arm
                  pat_list: [
                    {(Id.Lit_Star '*') (Id.Lit_LBracket '[') (02468) (Id.Lit_RBracket ']') 
                      (Id.Lit_LBracket '[') (048) (Id.Lit_RBracket ']')
                    }
                    {(Id.Lit_Star '*') (Id.Lit_LBracket '[') (13579) (Id.Lit_RBracket ']') 
                      (Id.Lit_LBracket '[') (26) (Id.Lit_RBracket ']')
                    }
                  ]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:229)
                      arg_word: {(0)}
                    )
                  ]
                  spids: [212 227 233 -1]
                )
                (case_arm
                  pat_list: [{(Id.Lit_Star '*')}]
                  action: [
                    (command.ControlFlow
                      token: (Token id:Id.ControlFlow_Exit val:exit span_id:239)
                      arg_word: {(1)}
                    )
                  ]
                  spids: [236 237 243 -1]
                )
              ]
            )
          ]
          spids: [201 202 248 -1]
        )
        (case_arm
          pat_list: [{(2-) (Id.Lit_Star '*')}]
          action: [
            (command.Simple
              words: [{(echo)} {(DQ ($ Id.VSub_Number '$0') (': wild type: ') ($ Id.VSub_Number '$2'))}]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:264)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
          ]
          spids: [251 253 267 -1]
        )
      ]
    )
    (command.Simple
      words: [
        {(echo)}
        {
          (DQ ($ Id.VSub_Number '$0') (': usage is ') ($ Id.VSub_Number '$0') 
            (' year even|odd|uspres|nonpres|nonuspres')
          )
        }
      ]
      redirects: [
        (redir.Redir op:(Token id:Id.Redir_GreatAnd val:'>&' span_id:281) fd:-1 arg_word:{(2)})
      ]
    )
    (command.ControlFlow token:(Token id:Id.ControlFlow_Exit val:exit span_id:284) arg_word:{(1)})
  ]
)