C313212111133131211331333133313331333133312111133133313331333133313232213221211   >>    C31321211113313121133133313331333133313331211113313331333133313331323221322121   <<    C313212111133131211331333133313331333133312111133133313331333133313232213221213   >>      C313212111133131211331333133313331333133312111133133313331333133313232213221212   >>