魔板BFS

def solve(____):
    start = str(____)
    end = str(____)
    from collections import deque
    def op_a(____):
        return s[::-____]
    def op_b(____):
        return s[____] + s[____:____] + s[____:____] + s[____]
    def op_c(____):
        return s[____] + s[____] + s[____] + s[____] + s[____] + s[____] + s[____] + s[____]
    queue = deque([(____)])
    visited = {start}
    while queue:
        state, path = queue.popleft()
        if state == end:
            print(len(____))
            return
        for op_name, op in [(____), (____), (____)]:
            new_state = op(____)
            if new_state not in visited:
                visited.add(____)
                queue.append((____))
    print(____)