#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,j,d,s;
	for(int i=31;i<100;i++){
		j=i*i;
		s=j/100%10;
		d=j/10%10;
		if(j/1000==s&&j%10==d){
			cout<<j<<endl;
		}
	}
	return 0;
}

/**************************************************************
	Problem: 1092
	User: zzz
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/