C13112133313331323321333133313331333133313331323133313112211231331   >>    C1311213331333132332133313331333133313331333132313331311221123133   <<    C13112133313331323321333133313331333133313331323133313112211231333   >>      C13112133313331323321333133313331333133313331323133313112211231332   >>