#include <bits/stdc++.h>
#define endl '\n'
using namespace std;
using ll = long long;

void solve() {
    ll H, W;
    cin >> H >> W;
    ll A, B;
    cin >> A >> B;
    A--;
    B--;
    ll r1, c1, r2, c2;
    cin >> r1 >> c1 >> r2 >> c2;
    r1--;
    c1--;
    r2--;
    c2--;
    ll P, Q;
    cin >> P >> Q;
    P--;
    Q--;

    ll ans = abs(P - A) + abs(Q - B);
    if (A < r1) {
        ans += r1 - A;
        A = r1;
    }
    if (r2 < A) {
        ans += A - r2;
        A = r2;
    }
    if (B < c1) {
        ans += c1 - B;
        B = c1;
    }
    if (c2 < B) {
        ans += B - c2;
        B = c2;
    }
    ans += abs(P - A) + abs(Q - B);

    cout << ans << endl;
    return;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll T = 1;
    // cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}