C131121333133313233213331333133313331333133313113313331211111232213231   >>    C13112133313331323321333133313331333133313331311331333121111123221323   <<    C131121333133313233213331333133313331333133313113313331211111232213233   >>      C131121333133313233213331333133313331333133313113313331211111232213232   >>