C11112331312111112111133133313331333132322121111331323323221231   >>    C1111233131211111211113313331333133313232212111133132332322123   <<    C11112331312111112111133133313331333132322121111331323323221233   >>      C11112331312111112111133133313331333132322121111331323323221232   >>