#include <bits/stdc++.h>
	using namespace std;
	int main(){
	int a,b,c,d,e,f,g=1000,h,i;
	for(;g<=9999;g++) {
		a=g%10;
		b=g/10%10; 
		c=g/100%10;
		d=g/1000;
		e=a+b*10;
		f=c+d*10;
		if((e+f)*(e+f)==g){
		cout<<g<<endl;}
	}
	
	
	
	
	
	
	
	}
/**************************************************************
	Problem: 1085
	User: zhuangwenya
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/