#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    auto f = [&](string s) -> vector<int> {
        s += '.';
        vector<int> ret;
        int v = 0;
        for(auto c : s){
            if(c == '.') ret.push_back(v),v = 0;
            else v *= 10,v += c-'0';
        }
        return ret;
    };
    
    string s; cin >> s;
    string t; cin >> t;
    if(f(t) <= f(s)) cout << "YES\n";
    else cout << "NO\n";
}