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

/**************************************************************
	Problem: 1629
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/