C11111333133313232233133313331333131133131331121111331313312111   >>    C1111133313331323223313331333133313113313133112111133131331211   <<    C11111333133313232233133313331333131133131331121111331313312113   >>      C11111333133313232233133313331333131133131331121111331313312112   >>