%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/enumerate.array {
    1 dict begin
    /a exch def
    [
      0 1 a length 1 sub {
          [ exch dup a exch get ]
      } for
    ]
    end
} bind def

/test.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} 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

/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

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


% end included library code

/is_vowel {
    << 65 true
       69 true
       73 true
       79 true
       85 true
       97 true
       101 true
       105 true
       111 true
       117 true >>
    exch known
} bind def

/stringalike {
    0 dict begin
    /a exch def
    a length 2 mod 1 eq {
        false
    } {
        /vt 0 def
        /mode 1 def
        /av false def
        a s2a enumerate.array dup {
            aload pop
            /c exch def
            /i exch def
            i 2 mul a length eq {
                /mode -1 def
            } if
            c is_vowel {
                /av true def
                /vt vt mode add def
            } if
        } forall
        vt 0 eq av and
    } ifelse
    end
} bind def

(stringalike) test.start
(textbook) stringalike not test
(book) stringalike test
(AbCdEfGh) stringalike test
(rhythmmyth) stringalike not test
(UmpireeAudio) stringalike not test
test.end