C312312111133131212111133133313231333133313331323221211111321123232311   >>    C31231211113313121211113313331323133313331333132322121111132112323231   <<    C312312111133131212111133133313231333133313331323221211111321123232313   >>      C312312111133131212111133133313231333133313331323221211111321123232312   >>