#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: zhangyilei
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/