C312312111133131212111133133313331333133312133313231333131333132313331322232211   >>    C31231211113313121211113313331333133313331213331323133313133313231333132223221   <<    C312312111133131212111133133313331333133312133313231333131333132313331322232213   >>      C312312111133131212111133133313331333133312133313231333131333132313331322232212   >>