// Header {{{
// includes {{{
#include <algorithm>
#include <cassert>
#include <cctype>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
// }}}
using namespace std;
// consts {{{
static const int INF = 1e9;
static const double PI = acos(-1.0);
static const double EPS = 1e-10;
// }}}
// typedefs {{{
typedef long long int LL;
typedef unsigned long long int ULL;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef vector<ULL> VULL;
typedef vector<VULL> VVULL;
typedef vector<double> VD;
typedef vector<VD> VVD;
typedef vector<bool> VB;
typedef vector<VB> VVB;
typedef vector<char> VC;
typedef vector<VC> VVC;
typedef vector<string> VS;
typedef vector<VS> VVS;
typedef pair<int, int> PII;
typedef complex<int> P;
// }}}
// macros & inline functions {{{
// syntax sugars {{{
#define FOR(i, b, e) for (int i = (b); i < (e); ++i)
#define FORI(i, b, e) for (int i = (b); i <= (e); ++i)
#define REP(i, n) FOR(i, 0, n)
#define REPI(i, n) FORI(i, 0, n)
#define OPOVER(_op, _type) inline bool operator _op (const _type &t) const
// }}}
// conversion {{{
inline int toInt(string s) {
	int v; istringstream sin(s); sin >> v; return v;
}
template<class T> inline string toString(T x) {
	ostringstream sout; sout << x; return sout.str();
}
// }}}
// array and STL {{{
#define ARRSIZE(a) ( sizeof(a) / sizeof(a[0]) )
#define F first
#define S second
#define MP(a, b) make_pair(a, b)
#define PB(e) push_back(e)
#define SORT(v) sort((v).begin(), (v).end())
#define RSORT(v) sort((v).rbegin(), (v).rend())
#define ALL(a) (a).begin(), (a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define EXIST(s, e) ((s).find(e) != (s).end())
// }}}
// for readable code {{{
#define EVEN(n) (n % 2 == 0)
#define ODD(n) (!EVEN(n))
// }}}
// debug {{{
#define arrsz(a) ( sizeof(a) / sizeof(a[0]) )
#define dprt(fmt, ...) if (opt_debug) { fprintf(stderr, fmt, ##__VA_ARGS__); }
#define darr(a) if (opt_debug) { copy( (a), (a) + arrsz(a), ostream_iterator<int>(cerr, " ") ); cerr << endl; }
#define darr_range(a, f, t) if (opt_debug) { copy( (a) + (f), (a) + (t), ostream_iterator<int>(cerr, " ") ); cerr << endl; }
#define dvec(v) if (opt_debug) { copy( ALL(v), ostream_iterator<int>(cerr, " ") ); cerr << endl; }
#define darr2(a) if (opt_debug) { FOR(__i, 0, (arrsz(a))){ darr( (a)[__i] ); } }
#define WAIT() if (opt_debug) { string _wait_; cerr << "(hit return to continue)" << endl; getline(cin, _wait_); }
#define dump(x) if (opt_debug) { cerr << " [L" << __LINE__ << "] " << #x << " = " << (x) << endl; }
#define dumpl(x) if (opt_debug) { cerr << " [L" << __LINE__ << "] " << #x << endl << (x) << endl; }
#define dumpf() if (opt_debug) { cerr << __PRETTY_FUNCTION__ << endl; }
// ostreams {{{
// complex
template<typename T> ostream& operator<<(ostream& s, const complex<T>& d) {
	return s << "(" << d.real() << ", " << d.imag() << ")";
}
// pair
template<typename T1, typename T2> ostream& operator<<(ostream& s, const pair<T1, T2>& d) {
	return s << "(" << d.first << ", " << d.second << ")";
}
// vector
template<typename T> ostream& operator<<(ostream& s, const vector<T>& d) {
	int len = d.size();
	REP(i, len) {
		s << d[i]; if (i < len - 1) s << "\t";
	}
	return s;
}
// 2 dimentional vector
template<typename T> ostream& operator<<(ostream& s, const vector< vector<T> >& d) {
	int len = d.size();
	REP(i, len) {
		s << d[i] << endl;
	}
	return s;
}
// map
template<typename T1, typename T2> ostream& operator<<(ostream& s, const map<T1, T2>& m) {
	s << "{" << endl;
	for (auto itr = m.begin(); itr != m.end(); ++itr) {
		s << "\t" << (*itr).first << " : " << (*itr).second << endl;
	}
	s << "}" << endl;
	return s;
}
// }}}
// }}}
// }}}
// string manipulation {{{
inline VS split(string s, char delimiter) {
	VS v; string t; REP(i, s.length()) {
		if (s[i] == delimiter) v.PB(t), t = ""; else t += s[i];
	} v.PB(t); return v;
}
inline string join(VS s, string j) {
	string t; REP(i, s.size()) {
		t += s[i] + j;
	} return t;
}
// }}}
// geometry {{{
#define Y real()
#define X imag()
// }}}
// 2 dimentional array {{{
P dydx4[4] = { P(-1, 0), P(0, 1), P(1, 0), P(0, -1) };
P dydx8[8] = { P(-1, 0), P(0, 1), P(1, 0), P(0, -1), P(-1, 1), P(1, 1), P(1, -1), P(-1, -1) };
int g_height, g_width;
bool in_field(P p) {
	return (0 <= p.Y && p.Y < g_height) && (0 <= p.X && p.X < g_width);
}
// }}}
// }}}
bool opt_debug = false;

#define PRINT(s) cout << (s) << endl

int main(int argc, char** argv) {
	cin.tie(0);
	ios::sync_with_stdio(false);

	string input1, input2;
	cin >> input1 >> input2;

	auto vs1 = split(input1, '.');
	auto vs2 = split(input2, '.');

	for (size_t i = 0; i < 3; ++i) {
		auto tmp1 = toInt(vs1[i]);
		auto tmp2 = toInt(vs2[i]);

		if (tmp1 == tmp2) continue;
		else if (tmp1 > tmp2) {
			cout << "YES" << endl;
			return 0;
		} else {
			cout << "NO" << endl;
			return 0;
		}
	}

	return 0;
}