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Select or download this

my @a = qw(a0 a1 a2);
my @b = qw(b0 b1 b2);
my @c = qw(c0 c1 c2 c3 c4);
...
print '(',join(',', one_each(@a, @b)),")\n";
print '(',join(',', one_each(@c, @d)),")\n";
print '(',join(',', one_each(@c, @d)),")\n";

Select or download this
```
(a0,b0)
(a1,b1)
(c2,d2)
()
```