C313212111113331323312111133133313331333133313331333133313331311312111133223211   >>    C31321211111333132331211113313331333133313331333133313331333131131211113322321   <<    C313212111113331323312111133133313331333133313331333133313331311312111133223213   >>      C313212111113331323312111133133313331333133313331333133313331311312111133223212   >>