The following text was written to the standard output stream when the ? program was executed from IntelliJ.
>>>help HELP - display menu of commands DISPLAY - display the list of words PRINT - print a word (FIRST; LAST; nth) SWAP - exchange two elements (nth; mth) ADD - add a word to the list EXIT - terminate execution of the program >>>display PHANTOM GHOST WRATH CHIRON DIVO VOITURE NOIRE CENTENARIO HUAYRA ZONDA REGERA >>>print first PHANTOM >>>print last REGERA >>>print 3 WRATH >>>print 10 ZONDA >>>swap 1 10 >>>display ZONDA GHOST WRATH CHIRON DIVO VOITURE NOIRE CENTENARIO HUAYRA PHANTOM REGERA >>>add first cars >>>add last sports >>>display cars ZONDA GHOST WRATH CHIRON DIVO VOITURE NOIRE CENTENARIO HUAYRA PHANTOM REGERA sports >>>exit Process finished with exit code 0