文件目录

#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
    string s;
    cin >> s;
    int d = s.find('.');
    if (d != -1)
        s = s.substr(0, d);
    string t = s;
    reverse(s.begin(), s.end());
    if (t == s)
        cout << "Yes";
    else
        cout << "No";
    return 0;
}