#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n/100%10==n/100) cout<<"y";
	if(n/100%10!=n/100) cout<<"n";
	return 0;
}
/**************************************************************
	Problem: 1628
	User: panjinyan
	Language: C++
	Result: Wrong Answer
****************************************************************/