#include <bits/stdc++.h>
using namespace std;

int main(){
    int n,g,s,b,q,w,sw;
    cin>>n;
    sw = n / 100000;
    w = n / 10000 % 10;
    q = n / 1000 % 10;
    b = n / 100 % 10;
    s = n / 10 % 10;
    g = n % 10;
    
    if(sw == g && w == s && q == b){
    	cout<<"Y";
	}else{
		cout<<"N";
	}
}