#include <iostream>
#include <string>
using namespace std;

bool isPali(string str) {
	int lo = 0, hi = str.size() - 1;
	while (lo < hi) {
		if (str[lo] != str[hi])		return false;
		++lo, --hi;
	}
	return true;
}

int main() {
	string str;
	
	while (getline(cin, str)) {
		if (isPali(str)) {
			cout << "Yes";
		}
		else cout << "No";
		cout << endl;
	}
	
}