#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>

using namespace std;

int asInt(string s) {

    int result = 0;

    result += s[4] - '0';
    result += (s[2] - '0') * 10;
    result += (s[0] - '0') * 100;
    return result;
}


int main() {

    string s1, s2;
    cin >> s1 >> s2;

    if (asInt(s1) >= asInt(s2)) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    };


    return 0;
}