I don't know entirely how things work, but I think your bottom code has some flaws. First, does all() return the number of elements in the junction in scalar context? If so, then that's ok.

Second, is it %hand or @hand? You're missing the array sigil with hash-slice syntax.

Third, I think any(0..4) isn't good enough. That's only good for getting individual elements, I think. You need something that returns (0 | 1 | 2 | 3 | 4 | (0,1) | (0,2) | (0,3) | (0,4) | (1,2) | (1,3) | (1,4) | (2,3) | (2,4) | (3,4) | (0,1,2) | (0,1,3) | (0,1,4) | (0,2,3) | (0,2,4) | (0,3,4) | (1,2,3) | (1,2,4) | (1,3,4) | (2,3,4) | (0,1,2,3) | (0,1,2,4) | (0,2,3,4) | (1,2,3,4)). I don't know offhand how to use any() and all() to achieve that.