Bataklik

import heapq


class AchtPuzzel:
    """ AchtPuzzel """
    BUREN = {0: {("R", 1), ("O", 3)},
             1: {("L", 0), ("R", 2), ("O", 4)},
             2: {("L", 1), ("O", 5)},
             3: {("B", 0), ("R", 4), ("O", 6)},
             4: {("B", 1), ("L", 3), ("R", 5), ("O", 7)},