#include<iostream>
using namespace std;
int n;
bool check(int x){
	int y=x*x;
	while(x!=0){
		if(x%10!=y%10)return false;
		x/=10;
		y/=10;
	}
	return true;
}
int main(){
	cin>>n;
	for(int j=2;j<=n;j++){
		if(check(j))cout<<j<<" ";
	}
	return 0;
}