nullniltruenulladdnxfalsetailaddnxxtailnilnilheadaddnxnappnilyyappaddnxyaddnappxyreversenilnilreverseaddnxappreversexaddnnilshufflexshuffxnilshuffxyifnullxxyappyaddheadxniliftruexyzyiffalsexyzshuffreversetailxznull1nil0true0add2false0tail1head1app2reverse1shuffle1shuff2if4FULL./TRS/SchneiderKamp/trs/thiemann03.trs