C131121333133313233213331333133313331333133313231333131122331211111211111321321   >>    C13112133313331323321333133313331333133313331323133313112233121111121111132132   <<    C131121333133313233213331333133313331333133313231333131122331211111211111321323   >>      C131121333133313233213331333133313331333133313231333131122331211111211111321322   >>