#include <fstream>
using namespace std;
int x,i,v[10020];
int main()
{
    ifstream f("numere8.in");
    ofstream g("numere8.out");
    while(f>>x)
     if(x<=9999) v[x]=1;
    for(i=9999;i>=1;i--)
       if(v[i]==0) g<<i<<" ";
    f.close();
    g.close();
    return 0;
}