C111123313121111121111331333133313331333133313331122112111133133313232212121   >>    C11112331312111112111133133313331333133313331333112211211113313331323221212   <<    C111123313121111121111331333133313331333133313331122112111133133313232212123   >>      C111123313121111121111331333133313331333133313331122112111133133313232212122   >>