C111112111133131121133133313331333133313331323133313331333133313233313221212121   >>    C11111211113313112113313331333133313331333132313331333133313331323331322121212   <<    C111112111133131121133133313331333133313331323133313331333133313233313221212123   >>      C111112111133131121133133313331333133313331323133313331333133313233313221212122   >>