C312312111133131212111133133313231333133313331323222313232321311   >>    C31231211113313121211113313331323133313331333132322231323232131   <<    C312312111133131212111133133313231333133313331323222313232321313   >>      C312312111133131212111133133313231333133313331323222313232321312   >>