#include <bits/stdc++.h>
using namespace std;
#include <algorithm>
 
int main(){
  string a, b;
  cin >> a >> b;
  regex_replace(a,regex("."),"");
  regex_replace(b,regex("."),"");
  int c = stoi(a);
  int d = stoi(b);
  if(a<b)cout << "No";
  else cout <<"Yes";
}