C131121333133313233213331333133313331333133313113313331211331121121   >>    C13112133313331323321333133313331333133313331311331333121133112112   <<    C131121333133313233213331333133313331333133313113313331211331121123   >>      C131121333133313233213331333133313331333133313113313331211331121122   >>