#include <iostream>

using namespace std;

int main()
{
    int n,i,v[999],nr,b=-1,a,c=0;
    for(i=0;i<=999;i++)
        v[i]=0;
    cin>>n;
    for(i=1;i<=n;i++)
        {
            cin>>nr;
            if(nr<=999)
               v[nr]++;
        }
    for(i=999;i>=100;i--)
    {
        if(v[i]==0)
            {
                if (b == -1)
                    b = i;
                else
                    a = i;
                c++;
                if(c==2)
                    break;
            }
    }
    if(c!=2)
        cout<<"NU EXISTA!";
    else
        cout<<a<<" "<<b;



    return 0;
}