C131121333133313233213331333133313331333133331211113313331322232233233111   >>    C13112133313331323321333133313331333133313333121111331333132223223323311   <<    C131121333133313233213331333133313331333133331211113313331322232233233113   >>      C131121333133313233213331333133313331333133331211113313331322232233233112   >>