C312312111111331312111133133313331333133322331323133313331213232311211   >>    C31231211111133131211113313331333133313332233132313331333121323231121   <<    C312312111111331312111133133313331333133322331323133313331213232311213   >>      C312312111111331312111133133313331333133322331323133313331213232311212   >>