C11112331312111112111133133313331311331323131323133313232233121111   >>    C1111233131211111211113313331333131133132313132313331323223312111   <<    C11112331312111112111133133313331311331323131323133313232233121113   >>      C11112331312111112111133133313331311331323131323133313232233121112   >>