C131121333133313233213331333133313331333133313133313331333231312113313232332311   >>    C13112133313331323321333133313331333133313331313331333133323131211331323233231   <<    C131121333133313233213331333133313331333133313133313331333231312113313232332313   >>      C131121333133313233213331333133313331333133313133313331333231312113313232332312   >>