C13112133313331323321333133313331333131211113313331333133312211231   >>    C1311213331333132332133313331333133313121111331333133313331221123   <<    C13112133313331323321333133313331333131211113313331333133312211233   >>      C13112133313331323321333133313331333131211113313331333133312211232   >>