>perl -le
"my $pbxex = 42;
 my $hash = $pbxex;
 ;;
 for (qw(CS EE EE CS EE)) {
   $hash{$_}++;
   printf qq{'$_$hash{$_}'  };
   }
"
'CS1'  'EE1'  'EE2'  'CS2'  'EE3'

>perl -wMstrict -le
"my $pbxex = 42;
 my $hash = $pbxex;
 ;;
 for (qw(CS EE EE CS EE)) {
   $hash{$_}++;
   printf qq{'$_$hash{$_}'  };
   }
"
Global symbol "%hash" requires explicit package name at -e line 1.
Global symbol "%hash" requires explicit package name at -e line 1.
Execution of -e aborted due to compilation errors.