`ṗ5Œœ€` returns a set of pairs odd/even (works fine).
I need to check that even part contains only `Øỵ` chars, and the odd part only `ØỴ` chars, but neither `Ƈ` nor `Ðḟ` (associated with `e€` things ...) seem to work. Any ideas? I'm so close, it bothers me ._.
Then this will interleave the things that were not filtered out: `żƝ€Y` (works fine)