C11111333133313232233133313331333131133131211113313123313233111   >>    C1111133313331323223313331333133313113313121111331312331323311   <<    C11111333133313232233133313331333131133131211113313123313233113   >>      C11111333133313232233133313331333131133131211113313123313233112   >>