#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,x;
	cin>>x;
	a=x%10;
	b=x/100;
	if(a==b)cout<<"Y";
	else cout<<"N";
	return 0;
}

/**************************************************************
	Problem: 1628
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/