C21321133133313121211113313331323133313231333133313133313113313232233231   >>    C2132113313331312121111331333132313331323133313331313331311331323223323   <<    C21321133133313121211113313331323133313231333133313133313113313232233233   >>      C21321133133313121211113313331323133313231333133313133313113313232233232   >>