gistfile1.txt

    token statement_label {
          [ '    ' $<label>=[<[0..9]>      ]         <.col6> ]
        | [ '   '  $<label>=[<[0..9]> ** 2 ]         <.col6> ]
        | [ '   '  $<label>=[<[0..9]>      ]    ' '  <.col6> ]
        | [ '  '   $<label>=[<[0..9]> ** 3 ]         <.col6> ]
        | [ '  '   $<label>=[<[0..9]> ** 2 ]    ' '  <.col6> ]
        | [ '  '   $<label>=[<[0..9]>      ]   '  '  <.col6> ]
        | [ ' '    $<label>=[<[0..9]> ** 4 ]         <.col6> ]
        | [ ' '    $<label>=[<[0..9]> ** 3 ]    ' '  <.col6> ]
        | [ ' '    $<label>=[<[0..9]> ** 2 ]   '  '  <.col6> ]
        | [ ' '    $<label>=[<[0..9]>      ]  '   '  <.col6> ]
        | [        $<label>=[<[0..9]> ** 5 ]         <.col6> ]
        | [        $<label>=[<[0..9]> ** 4 ]    ' '  <.col6> ]
        | [        $<label>=[<[0..9]> ** 3 ]   '  '  <.col6> ]
        | [        $<label>=[<[0..9]> ** 2 ]  '   '  <.col6> ]
        | [        $<label>=[<[0..9]>      ] '    '  <.col6> ]
    }