C13112133313331323321333133313331333133313331323133313112113213331   >>    C1311213331333132332133313331333133313331333132313331311211321333   <<    C13112133313331323321333133313331333133313331323133313112113213333   >>      C13112133313331323321333133313331333133313331323133313112113213332   >>