C11112331312111112111133133313331333132311211331323113313232221   >>    C1111233131211111211113313331333133313231121133132311331323222   <<    C11112331312111112111133133313331333132311211331323113313232223   >>      C11112331312111112111133133313331333132311211331323113313232222   >>