C13112133313331323321333133313331333133313331313331333131122221233131   >>    C1311213331333132332133313331333133313331333131333133313112222123313   <<    C13112133313331323321333133313331333133313331313331333131122221233133   >>      C13112133313331323321333133313331333133313331313331333131122221233132   >>