C131121333133313233213331333133313331333133313331333133313123223213113312111   >>    C13112133313331323321333133313331333133313331333133313331312322321311331211   <<    C131121333133313233213331333133313331333133313331333133313123223213113312113   >>      C131121333133313233213331333133313331333133313331333133313123223213113312112   >>