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# Symmetric difference

```perl
my \A = set <John Serena Bob Mary Serena>;
my \B = set <Jim Mary John Jim Bob>;

say  A ∖ B; # Set subtraction
say  B ∖ A; # Set subtraction
say (A ∪ B) ∖ (A ∩ B);  # Symmetric difference, via basic set operations
say  A ⊖ B;             # Symmetric difference, via dedicated operator
```

#### Output:

```
set(Serena)
set(Jim)
set(Jim, Serena)
set(Jim, Serena)
```