C131121333133313233213331333133313331333133313331333133313123223213112112131   >>    C13112133313331323321333133313331333133313331333133313331312322321311211213   <<    C131121333133313233213331333133313331333133313331333133313123223213112112133   >>      C131121333133313233213331333133313331333133313331333133313123223213112112132   >>