#include<bits/stdc++.h>
using namespace std;
int main(){ 
	int n,m,j;
	cin>>n;
	m=n%10;
	j=n/100;
	if(m==j){
		cout<<"Y";
	}else{
		cout<<"N";
	}
}
/**************************************************************
	Problem: 1628
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/