#include<bits/stdc++.h>
using namespace std;
int main(){ 
	int n,m,j,h,g,t,y;
	cin>>n;
	m=n%10;
	j=n/100000;
	h=n/10%10;
	g=n/1000%10;
	t=n/100%10;
	y=n/10000%10;
	if(m==j&&t==g&&h==y){
		cout<<"Y";
	}else{
		cout<<"N";
	}
}
/**************************************************************
	Problem: 1629
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/