C11112331312111112111133133313331333132322121111331323223332221   >>    C1111233131211111211113313331333133313232212111133132322333222   <<    C11112331312111112111133133313331333132322121111331323223332223   >>      C11112331312111112111133133313331333132322121111331323223332222   >>