#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d,e,f,x;
	cin>>x;
	a=x%10;
	b=x/10%10;
	c=x/100%10;
	d=x/1000%10;
	e=x/10000%10;
	f=x/100000;
	if(a==f&&b==e&&c==d)cout<<"Y";
	else cout<<"N";
	return 0;
}

/**************************************************************
	Problem: 1629
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/