C131121333133313233213331333133313231333133313331333133312323231   >>    C13112133313331323321333133313331323133313331333133313331232323   <<    C131121333133313233213331333133313231333133313331333133312323233   >>      C131121333133313233213331333133313231333133313331333133312323232   >>