#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int h, w, a, b, ly, lx, ry, rx, p, q;
    cin >> h >> w >> a >> b >> ly >> lx >> ry >> rx >> p >> q;
    int ans = 1 << 30;
    for(int y = ly; y <= ry; y++){
        for(int x = lx; x <= rx; x++){
            ans = min(ans, abs(y - p) + abs(y - a) + abs(x - q) + abs(x - b));
        }
    }
    ans += abs(p - a) + abs(q - b);
    cout << ans << '\n';
}