C1111233131211111211113313331333133313331333133313331333133313111323123121   >>    C111123313121111121111331333133313331333133313331333133313331311132312312   <<    C1111233131211111211113313331333133313331333133313331333133313111323123123   >>      C1111233131211111211113313331333133313331333133313331333133313111323123122   >>