C131121333133313233213331333133313331333133313231333131121133113231   >>    C13112133313331323321333133313331333133313331323133313112113311323   <<    C131121333133313233213331333133313331333133313231333131121133113233   >>      C131121333133313233213331333133313331333133313231333131121133113232   >>