C131121333133313233213331333133313331333133313133313331333231312113313223231   >>    C13112133313331323321333133313331333133313331313331333133323131211331322323   <<    C131121333133313233213331333133313331333133313133313331333231312113313223233   >>      C131121333133313233213331333133313331333133313133313331333231312113313223232   >>