#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: wengsihan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/