C131121333133313233213331333133313331333133313331333133313123223211312131   >>    C13112133313331323321333133313331333133313331333133313331312322321131213   <<    C131121333133313233213331333133313331333133313331333133313123223211312133   >>      C131121333133313233213331333133313331333133313331333133313123223211312132   >>