C131121333133313233213331333133313331333133331211113313331322223313223313112131   >>    C13112133313331323321333133313331333133313333121111331333132222331322331311213   <<    C131121333133313233213331333133313331333133331211113313331322223313223313112133   >>      C131121333133313233213331333133313331333133331211113313331322223313223313112132   >>