instructions are a sequence of L, R indicating whether a transition leads to left or right next transitions are positions with a next point to reach based on an instruction instructions are followed till a transition leads to ZZZ, if end of instructions is reached start them from the beginning.

more complex version of SolvePuzzle1 - we have multiple start points, namely each Position that ends in A, eg ZBA - we follow the instructions simultanously for each start point - we stop when all start points reach a position that ends in Z, eg BQZ instructions are a sequence of L, R indicating whether a transition leads to left or right next transitions are positions with a next point to reach based on an instruction.