C131121333133313233213331333133313331333133313231323221323323231   >>    C13112133313331323321333133313331333133313331323132322132332323   <<    C131121333133313233213331333133313331333133313231323221323323233   >>      C131121333133313233213331333133313331333133313231323221323323232   >>