C111123313331323113313331333133313331323132333133313331311221123133313121   >>    C11112331333132311331333133313331333132313233313331333131122112313331312   <<    C111123313331323113313331333133313331323132333133313331311221123133313123   >>      C111123313331323113313331333133313331323132333133313331311221123133313122   >>