#include <iostream>
#include <iomanip>
#include <vector>
#include <list>
#include <deque>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <limits>

using namespace std;

#define FOR(x,y) for(int x = 0;x < (y);x++)
#define LLI long long int
#define FORR(x,arr) for(auto& x:arr)
#define ALL(a) (a.begin()),(a.end())

#define _L(x) cout<<(x)<<endl

struct Element{
    LLI Value;
    vector<int> R;
};

vector<int> ToNumeric(string text)
{
    vector<int> v(3);
    int j = 0;
    for(int i = 0;i < text.length();i++)
    {
        if(text[i] == '.')
        {
            j++;
        }
        else
        {
            v[j] *= 10;
            v[j] += text[i]-'0';
        }
    }
    return v;
}

int main()
{
    string source, target;
    cin >> source;
    cin >> target;
    
    auto sourceN = ToNumeric(source);
    auto targetN =ToNumeric(target);
    for(int i = 0;i < 3;i++)
    {
        if(sourceN[i] > targetN[i])
        {
            cout << "YES" << endl;
            return 0;
        }
        if(sourceN[i] < targetN[i])
        {
            cout << "NO" << endl;
            return 0;
        }
    }
    cout << "YES" << endl;
    return 0;
    
    return 0;
}