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