C313212111113331323312111133133313331333133313331333133313231333133313133122121   >>    C31321211111333132331211113313331333133313331333133313331323133313331313312212   <<    C313212111113331323312111133133313331333133313331333133313231333133313133122123   >>      C313212111113331323312111133133313331333133313331333133313231333133313133122122   >>