C312312111133131212111133133313231333132311331333132322132322221   >>    C31231211113313121211113313331323133313231133133313232213232222   <<    C312312111133131212111133133313231333132311331333132322132322223   >>      C312312111133131212111133133313231333132311331333132322132322222   >>