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