C11112331312111112111133133313331333133313331333133313331333131232233221   >>    C1111233131211111211113313331333133313331333133313331333133313123223322   <<    C11112331312111112111133133313331333133313331333133313331333131232233223   >>      C11112331312111112111133133313331333133313331333133313331333131232233222   >>