C313212111113331323312111133133313331333133313331333133313221211   >>    C31321211111333132331211113313331333133313331333133313331322121   <<    C313212111113331323312111133133313331333133313331333133313221213   >>      C313212111113331323312111133133313331333133313331333133313221212   >>