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

/**************************************************************
	Problem: 1628
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:18 ms
	Memory:2072 kb
****************************************************************/