#include<bits/stdc++.h>
using namespace std;
int main(){
	
	int n,x,y,s,b,c,d,k,l;
	cin>>n;
	x=n/10000;
	y=n/1000%10;
	s=n/100%10;
	b=n/100;
	c=n/10%10;
	d=n%10;
	k=x*100+y*10+s;
	l=b*100+c*10+d;
	if(k==l){
		cout<<"Y";
	}else{
		cout<<"N";
	}
	
	return 0;
}
/**************************************************************
	Problem: 1629
	User: huangyaojie3
	Language: C++
	Result: Wrong Answer
****************************************************************/