#include <iostream>
#include <fstream>
using namespace std;
///CU FORMULA
/*
int main()
{
    ifstream f("numere.in");
    int x;
    bool gasit=false;
    while(f>>x)
        if(x%3==1)
        {
            cout<<x<<" ";
            gasit=true;
        }
    if (gasit==false)
        cout<<"nu exista";
}

*/

int main()
{
    ifstream f("numere.in");
    int x, f1=1, f2=4, f3;
    bool gasit=false;
    while(f>>x)
    {
       while(f1<x)
       {
           f3=2*f2-f1;
           f1=f2;
           f2=f3;
       }
       if(f1==x)
       {
           cout<<x<<" ";
           gasit=true;
       }
    }
  if(gasit==false)
    cout<<"Nu exista";
}