C131121333133313233213331333133313331333133313331313112113322321   >>    C13112133313331323321333133313331333133313331333131311211332232   <<    C131121333133313233213331333133313331333133313331313112113322323   >>      C131121333133313233213331333133313331333133313331313112113322322   >>