or maybe 12 (4! / 2) if we assume that people put the left arrow to the left of the right arrow
most of the ones i haven't seen are, in contrast, ABAB. the main exception is ← ↑ ↓ →, which is ABBA and i'm surprised i didn't see it in use
or maybe 12 (4! / 2) if we assume that people put the left arrow to the left of the right arrow
most of the ones i haven't seen are, in contrast, ABAB. the main exception is ← ↑ ↓ →, which is ABBA and i'm surprised i didn't see it in use