C131121333133313233213331333133313331333133313231323133311211121   >>    C13112133313331323321333133313331333133313331323132313331121112   <<    C131121333133313233213331333133313331333133313231323133311211123   >>      C131121333133313233213331333133313331333133313231323133311211122   >>