C131121333133313233213331333133313331333133313231323311331333131211   >>    C13112133313331323321333133313331333133313331323132331133133313121   <<    C131121333133313233213331333133313331333133313231323311331333131213   >>      C131121333133313233213331333133313331333133313231323311331333131212   >>