#include<bits/stdc++.h>
using namespace std;
int main()
{
	int t1,t2,t3,t4;
	int t;
	for(int i=32;i<100;i++)
	{
		int t=i*i;
		t1=t%10;
		t2=t/10%10;
		t3=t/100%10;
		t4=t/1000%10;
		if(t1==t2 && t3==t4)
		{
			cout<<t;
		}
	}
	
	return 0;
}
/**************************************************************
	Problem: 1092
	User: chenkexin
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/