C312312111133131212111133133313231333133313331323221211111133132331232131121   >>    C31231211113313121211113313331323133313331333132322121111113313233123213112   <<    C312312111133131212111133133313231333133313331323221211111133132331232131123   >>      C312312111133131212111133133313231333133313331323221211111133132331232131122   >>