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my %symtab;

...
print($symtab{A} + $symtab{B}, $/);
print($symtab{A} + $symtab{B} + $symtab{C}, $/);
print($symtab{C} + $symtab{A} + $symtab{D}, $/);

Select or download this
```
my %symtab;

...
B|20
C|20
D|40
```