C131121333133313233213331333133313331333133313113313233231323222311   >>    C13112133313331323321333133313331333133313331311331323323132322231   <<    C131121333133313233213331333133313331333133313113313233231323222313   >>      C131121333133313233213331333133313331333133313113313233231323222312   >>