#include <iostream>
using namespace std;

string s;

int main()
{
	while (cin >> s)
	{
		bool f = false;
		for (int i = 0, j = s.size() - 1; i < j ; i ++, j -- )
			if (s[i] != s[j]) f = true;
		f ? puts("No") : puts("Yes");
	}
	return 0;
}