C111123313331323113313331333133313331122112312111133133313223313121331   >>    C11112331333132311331333133313331333112211231211113313331322331312133   <<    C111123313331323113313331333133313331122112312111133133313223313121333   >>      C111123313331323113313331333133313331122112312111133133313223313121332   >>