#include "bits/stdc++.h"

using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
	REP(i, v.size()) { if (i)os << " "; os << v[i]; }return os;
}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
	REP(i, v.size()) { if (i)os << endl; os << v[i]; }return os;
}

const ll INF = 1LL << 60;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

#define int long long

inline void my_io() {

	std::ios::sync_with_stdio(false);

	std::cin.tie(0);

	cout << fixed << setprecision(16);

	//cout << setprecision(10) << scientific << ans << endl;
}

signed main() {
	string s1, s2;

	cin >> s1 >> s2;

	vector<ll> v;
	string now = "";

	REP(i, s1.size()) {
		if (s1[i] == '.') {
			v.push_back(stoll(now));
			now = "";
		}
		else {
			now += s1[i];
		}
	}
	
	v.push_back(stoll(now));
	now = "";

	REP(i, s2.size()) {
		if (s2[i] == '.') {
			v.push_back(stoll(now));
			now = "";
		}
		else {
			now += s2[i];
		}
	}

	v.push_back(stoll(now));

	if (v[3] > v[0]) {
		cout << "NO" << endl;
	}
	else if (v[3] < v[0]) {
		cout << "YES" << endl;
	}
	else {
		if (v[4] > v[1]) {
			cout << "NO" << endl;
		}
		else if (v[4] < v[1]) {
			cout << "YES" << endl;
		}
		else {
			if (v[5] > v[2]) {
				cout << "NO" << endl;
			}
			else {
				cout << "YES" << endl;
			}
		}
	}
}