perl a 
(nothing happens)

perl b 
(nothing happens)

perl c
Unrecognized character \xCF; marked by <-- HERE after <-- HERE near column 1 at c line 1.

perl v
Number found where operator expected (Do you need to predeclare "perl"?) at v line 2, near "perl 5"
syntax error at v line 2, near "perl 5"
Execution of v aborted due to compilation errors.