C131121333133313233213331333133313331333133313331333133313331333131211111312131   >>    C13112133313331323321333133313331333133313331333133313331333133313121111131213   <<    C131121333133313233213331333133313331333133313331333133313331333131211111312133   >>      C131121333133313233213331333133313331333133313331333133313331333131211111312132   >>