C312312111133131212111133133313231333132313331333133313233223231   >>    C31231211113313121211113313331323133313231333133313331323322323   <<    C312312111133131212111133133313231333132313331333133313233223233   >>      C312312111133131212111133133313231333132313331333133313233223232   >>