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