Untitled

//дз 4.
#include <iostream>
using namespace std;
int main()
{
	int a;
	cin >> a;
	if (a % 10 == a / 10000 && ((a % 100) / 10) == (a % 10000) / 1000)
	{
		cout << "Yes";
	}
	else
	{
		cout << "No";
	}
	return 0;
}