C131121333133313233213331333133313331333133313331333133313123223212111113232321   >>    C13112133313331323321333133313331333133313331333133313331312322321211111323232   <<    C131121333133313233213331333133313331333133313331333133313123223212111113232323   >>      C131121333133313233213331333133313331333133313331333133313123223212111113232322   >>