Unquoted string "easy" may clash with future reserved word at D:\_Perl_\pl_test\977910.pl line 6. Unquoted string "hard" may clash with future reserved word at D:\_Perl_\pl_test\977910.pl line 9. Found = in conditional, should be == at D:\_Perl_\pl_test\977910.pl line 13. Unquoted string "easy" may clash with future reserved word at D:\_Perl_\pl_test\977910.pl line 13. Unquoted string "hard" may clash with future reserved word at D:\_Perl_\pl_test\977910.pl line 16. Found = in conditional, should be == at D:\_Perl_\pl_test\977910.pl line 20. Found = in conditional, should be == at D:\_Perl_\pl_test\977910.pl line 47. Name "main::RNG" used only once: possible typo at D:\_Perl_\pl_test\977910.pl line 21. D:\_Perl_\pl_test\977910.pl syntax OK