C312312111133131212111133133313331333133112113313331333131123313223111   >>    C31231211113313121211113313331333133313311211331333133313112331322311   <<    C312312111133131212111133133313331333133112113313331333131123313223113   >>      C312312111133131212111133133313331333133112113313331333131123313223112   >>