#include <iostream>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <string>
#include <algorithm>
#include <utility>
#include <complex>
#define rep(x, s, t) for(llint (x) = (s); (x) <= (t); (x)++)
#define chmin(x, y) (x) = min((x), (y))
#define chmax(x, y) (x) = max((x), (y))
#define all(x) (x).begin(),(x).end()
#define inf 1e18

using namespace std;

typedef long long llint;
typedef long long ll;
typedef pair<llint, llint> P;

ll a[3], b[3];

bool check(ll a[])
{
	if(a[0] == a[1] || a[1] == a[2] || a[2] == a[0]) return false;
	if(a[0] > a[1] && a[1] < a[2]) return true;
	if(a[0] < a[1] && a[1] > a[2]) return true;
	return false;
}

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	rep(i, 0, 2) cin >> a[i];
	rep(i, 0, 2) cin >> b[i];
	
	rep(i, 0, 2) rep(j, 0, 2){
		swap(a[i], b[j]);
		if(check(a) && check(b)){
			cout << "Yes" << endl;
			return 0;
		}
		swap(a[i], b[j]);
	}
	cout << "No" << endl;
	
	return 0;
}