C131121333133313233213331333133313331333133331211113313331322223313221121   >>    C13112133313331323321333133313331333133313333121111331333132222331322112   <<    C131121333133313233213331333133313331333133331211113313331322223313221123   >>      C131121333133313233213331333133313331333133331211113313331322223313221122   >>