#include <iostream>
using namespace std;
int main()
{
	int a,b,c,d,e,f;
	for(int i = 1000;i<=9999;i++)
	{
		a = i/1000;
		b = (i/100)%10;
		c = (i/10)%10;
		d = i%10;
		e = a*10+b;
		f = c*10+d;
		if((e+f)*(e+f) == i)
		{
			cout << i << endl;
		}
	}
 } 
/**************************************************************
	Problem: 1085
	User: xiaomingze
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/