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

/**************************************************************
	Problem: 1628
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/