C131121333133313233213331333133313331333133313331333133313231122112312121   >>    C13112133313331323321333133313331333133313331333133313331323112211231212   <<    C131121333133313233213331333133313331333133313331333133313231122112312123   >>      C131121333133313233213331333133313331333133313331333133313231122112312122   >>