C31231211111133131211113313331323133313331311233132313331333133313232232211   >>    C3123121111113313121111331333132313331333131123313231333133313331323223221   <<    C31231211111133131211113313331323133313331311233132313331333133313232232213   >>      C31231211111133131211113313331323133313331311233132313331333133313232232212   >>