#include <iostream>
#include <iomanip>

#include <algorithm>
#include <math.h>

#include <string>
#include <list>
/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

int main(void){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout << fixed;//
	//cout << setprecision(6);//

	string a,b;
	cin>>a>>b;
	int A[3];
	int B[3];
	rep(i,3){
		A[i] = 0;
		B[i] = 0;
	}
	/////////
	int count = 0;
	rep(i,a.size()){
		if(a[i] == '.'){
			++count;
		}else{
			A[count] = A[count]*10 + a[i] - '0';
		}
	}
	count = 0;
	rep(i,b.size()){
		if(b[i] == '.'){
			++count;
		}else{
			B[count] = B[count]*10 + b[i] - '0';
		}
	}
	/////////
	rep(i,3){
		if(A[i] > B[i]){
			P("YES");
			break;
		}else if( A[i] < B[i]){
			P("NO");
			break;
		}else{//A[i]==B[i];
			if(i != 2){
				P("YES");
				break;//
			}else{
				//continue
			}
		}
	}
	return 0;
}