%!PS

% begin included library code
% see https://codeberg.org/Firedrake/postscript-libraries/
/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

/keys { % dict -> array of dict keys
    [ exch
      {
          pop
      } forall
    ]
} 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.start {
    print (:) print
    /test.pass 0 def
    /test.count 0 def
} bind def


% end included library code

/word2map {
    2 dict begin
    /m 0 dict def
    {
        /c exch def
        c 65 ge c 90 le and {
            /c c 32 add def
        } if
        c 97 ge c 122 le and {
            m c known {
                m c m c get 1 add put
            } {
                m c 1 put
            } ifelse
        } if
    } forall
    m
    end
} bind def

/goodstrings {
    5 dict begin
    word2map /cm exch def
    0 exch
    {
        /w exch def
        /f w word2map def
        /valid true def
        f keys {
            /c exch def
            cm c known not {
                /valid false def
                exit
            } if
            f c get cm c get gt {
                /valid false def
                exit
            } if
        } forall
        valid {
            w length add
        } if
    } forall
    end
} bind def

(goodstrings) test.start
[(cat) (bt) (hat) (tree)] (atach) goodstrings 6 eq test
[(hello) (world) (challenge)] (welldonehopper) goodstrings 10 eq test
test.end