%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def

/reverse {
    1 dict begin
    dup length /l exch def
    [ exch
      aload pop
      2 1 l {
          -1 roll
      } for
    ]
    end
} bind def

/test {
    /test.count test.count 1 add def
    {
        /test.pass test.pass 1 add def
    } {
        ( ) print
        test.count (....) cvs print
        (-fail) print
    } ifelse
} bind def

/s2a {
    [ exch { } forall ]
} bind def

/test.end {
    ( ) print
    test.count 0 gt {
        (Passed ) print
        test.pass (...) cvs print
        (/) print
        test.count (...) cvs print
        ( \() print
        test.pass 100 mul test.count idiv (...) cvs print
        (%\)) print
        (\r\n) print
    } if
} bind def

/a2s {
    2 dict begin
    /i exch def
    i length dup string /o exch def
    1 sub 0 exch 1 exch {
        dup i 3 -1 roll get o 3 1 roll put
    } for
    o
    end
} bind def


% end included library code

/baftera {
    0 dict begin
    /a exch def
    /firstb a (b) search {
        3 1 roll pop pop length
    } {
        pop -1
    } ifelse def
    /lasta a s2a reverse a2s (a) search {
        3 1 roll pop pop length a length 1 sub exch sub
    } {
        pop -1
    } ifelse def
    firstb -1 eq {
        false
    } {
        lasta -1 eq {
            true
        } {
            lasta firstb lt
        } ifelse
    } ifelse
    end
} bind def

(baftera) test.start
(aabb) baftera test
(abab) baftera not test
(aaa) baftera not test
(bbb) baftera test
test.end