C312312111133131212111133133313231333132313331333133313232322221   >>    C31231211113313121211113313331323133313231333133313331323232222   <<    C312312111133131212111133133313231333132313331333133313232322223   >>      C312312111133131212111133133313231333132313331333133313232322222   >>