#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for(int i=0; i<(n); i++)
int main()
{
	string S;
	vector<int> str;

	while( getline( cin, S ) )
	{
		size_t pos = 0;
		for( size_t i = pos; i < S.size(); i++ )
		{
			pos = S.find_first_of( '.' , pos );
			string tmp = S.substr( i, pos );
			str.push_back( stoi(tmp) );
			i += pos;
		}
	}
	if( str[0] < str[3] )
	{
		cout << "NO" << endl;
		return 0;
	}
	else if( str[0] == str[3] )
	{
		if( str[1] < str[4] )
		{
			cout << "NO" << endl;
			return 0;
		}
		else if( str[1] == str[4] )
		{
			if( str[2] < str[5] )
			{
				cout << "NO" << endl;
				return 0;
			}
		}
	}   
	cout << "YES" << endl;
	return 0;
}