#include<stdio.h>

void main(){
	int i,g,s,b,q,m,n;
	
	for(i=1000;i<=9999;i++){
		g=i%10;
		s=i/10%10;
		b=i/100%10;
		q=i/1000;
		m=s*10+g;
		n=q*10+b;
		if(i==(m+n)*(m+n)){
			printf("%d\n",i); 
		}
	}

}
/**************************************************************
	Problem: 1085
	User: admin
	Language: C
	Result: Accepted
	Time:4 ms
	Memory:1036 kb
****************************************************************/