#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <fstream>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>
#include <numeric>
#include <iterator>

typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;





int main()
{

    int Q;
    Q = 1;
    //cin >> Q;


    while (Q--) {
       
        string a, b;
        cin >> a >> b;
        vector<int>x, y;
        int d = 0;
        for (int i = 0; i < a.size(); i++) {
            if (a[i] == '.') {
                x.push_back(d); d = 0;
            }
            else {
                d *= 10;
                d += a[i] - '0';
            }
        }
        x.push_back(d);
        d = 0;
        for (int i = 0; i < b.size(); i++) {
            if (b[i] == '.') {
                y.push_back(d); d = 0;
            }
            else {
                d *= 10;
                d += b[i] - '0';
            }
        }
        y.push_back(d);
        bool f = 0;
        if (x[0] > y[0])f = 1;
        if (x[0] == y[0] && x[1] > y[1] )f = 1;
        if(x[0] == y[0] && x[1] == y[1] && x[2] > y[2])f = 1;
        if (!f) cout << "NO";
        else cout << "YES";
    }
    return 0;
}