%!PS

% begin included library code
% see https://github.com/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

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

/isprime {
    4 dict begin
    /candidate exch def
    1 {
        candidate 2 lt {
            false
            exit
        } if
        candidate 2 eq {
            true
            exit
        } if
        candidate 2 mod 0 eq {
            false
            exit
        } if
        candidate 3 eq {
            true
            exit
        } if
        candidate 3 mod 0 eq {
            false
            exit
        } if
        /prime true def
        /limit candidate sqrt cvi 1 add def
        /anchor 0 def
        {
            /anchor anchor 6 add def
            anchor limit gt {
                exit
            } if
            [ -1 1 ] {
                anchor add candidate exch mod 0 eq {
                    /prime false def
                    exit
                } if
            } forall
            prime false eq {
                exit
            } if
        } loop
        prime
    } repeat
    end
} bind def

/strjoin % [(a) (b) (c)] (j) -> (ajbjc)
{
    3 dict begin
    /j exch def
    dup 0 get /out exch def
    /first true def
    {
        first {
            pop
            /first false def
        } {
            out j strconcat
            exch strconcat
            /out exch def
        } ifelse
    } forall
    out
    end
} bind def

/strconcat % (a) (b) -> (ab)  
{ exch dup length
  2 index length add string
  dup dup 4 2 roll copy length
  4 -1 roll putinterval
} bind def

/deepeq {
    2 dict begin
    /a exch def
    /b exch def
    a type b type eq {
        a type /dicttype eq {
            a length b length eq {
                <<
                    a {
                        pop
                        true
                    } forall
                    b {
                        pop
                        true
                    } forall
                >>
                true exch
                {
                    pop
                    dup a exch known {
                        dup b exch known {
                            dup a exch get exch b exch get deepeq not {
                                pop false
                            } if
                        } {
                            false
                        } ifelse
                    } {
                        false
                    } ifelse
                } forall
            } {
                false
            } ifelse
        } {
            a type dup /arraytype eq exch /stringtype eq or {
                a length b length eq {
                    true
                    0 1 a length 1 sub {
                        dup a exch get exch b exch get deepeq not {
                            pop false
                            exit
                        } if
                    } for
                } {
                    false
                } ifelse
            } {
                a b eq
            } ifelse
        } ifelse
    } {
        false
    } ifelse
    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


% end included library code

/cvss {
    dup log cvi 1 add string cvs
} bind def

% from https://www.rosettacode.org/wiki/Reverse_a_string#PostScript

/reverse {
    3 dict begin
    /str exch def
    /temp str 0 get def
    /i 0 def
    str length 2 idiv {
        /temp str i get def
        str i str str length i sub 1 sub get put
        str str length i sub 1 sub temp put
        /i i 1 add def
    } repeat
    str
    end
} bind def

/ppc {
    4 dict begin
    /ct exch def
    [
        /fh 0 def
        {
            /fh fh 1 add def
            /q true def
            fh {
                dup 0 gt {
                    dup 10 mod 0 eq
                    {
                        /q false def
                        pop
                        exit
                    } {
                        10 idiv
                    } ifelse
                } {
                    pop
                    exit
                } ifelse
            } loop
            q {
                [ fh cvss dup dup length string cvs reverse (0) exch ] () strjoin cvi
                dup isprime {
                    /ct ct 1 sub def
                    ct 0 le {
                        exit
                    } if
                } {
                    pop
                } ifelse
            } if
            ct 0 le {
                exit
            } if
        } loop
    ]
    end
} bind def

(ppc) test.start
20 ppc
[ 101 16061 31013 35053 38083 73037 74047 91019 94049 1120211 1150511
  1160611 1180811 1190911 1250521 1280821 1360631 1390931 1490941
  1520251 ]
deepeq test
test.end