Scalar found where operator expected at simmat.pl line 43, near ")
        $sim"
        (Missing operator before $sim?)
Global symbol "@words" requires explicit package name at simmat.pl line 36.
Global symbol "@words" requires explicit package name at simmat.pl line 40.
Global symbol "@words" requires explicit package name at simmat.pl line 41.
Global symbol "@sim" requires explicit package name at simmat.pl line 42.
Global symbol "@words" requires explicit package name at simmat.pl line 42.
Global symbol "@words" requires explicit package name at simmat.pl line 42.
syntax error at simmat.pl line 43, near ")
        $sim"
Global symbol "@sim" requires explicit package name at simmat.pl line 43.
Global symbol "@sim" requires explicit package name at simmat.pl line 43.
Global symbol "@sim" requires explicit package name at simmat.pl line 57.
Execution of simmat.pl aborted due to compilation errors.