$ perl -e " use Strict; "
Incorrect use of pragma 'strict' at -e line 1.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.

$ perl -e " use Warnings; "
Incorrect use of pragma 'warnings' at -e line 1.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.