C312312111133131212111133133313231333133313331333133311211332212231   >>    C31231211113313121211113313331323133313331333133313331121133221223   <<    C312312111133131212111133133313231333133313331333133311211332212233   >>      C312312111133131212111133133313231333133313331333133311211332212232   >>