Reduce redundancy in moves

[Odilf]

Doing R after R is redundant. Just do R2. The thing is that it's not super straightforward how to do that.

Related to #11

What I want eventually is:

• [x] Generate non redundant algs of a certain length
• [x] Collapse redundancies in algs
• [x] Get successors smartly (or rather, not dumbly)