C11111333133313232233133313331333133313332313331211113313121133133313211   >>    C1111133313331323223313331333133313331333231333121111331312113313331321   <<    C11111333133313232233133313331333133313332313331211113313121133133313213   >>      C11111333133313232233133313331333133313332313331211113313121133133313212   >>