+------------+ +---+
| $a = "9"; | | 2 |
| my $b = 1; | --> | |
+------------+ +---+
+------------+ +---+
| $a = ";% | --> | 4 |
+------------+ +---+
+------------+ +---+
| $a = "9"; | | 2 |
| my $b = 1; | --> | |
+------------+ +---+
+------------+ +---+
| $a = ";% | --> | 4 |
+------------+ +---+