C13112133313331323321333133313331333133313331311331323133313131122112112121   >>    C1311213331333132332133313331333133313331333131133132313331313112211211212   <<    C13112133313331323321333133313331333133313331311331323133313131122112112123   >>      C13112133313331323321333133313331333133313331311331323133313131122112112122   >>