#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int x1, y1;     cin >> x1 >> y1;     int x2, y2;     cin >> x2 >> y2;     int ans = 0x3f3f3f3f;     for (int i = -1; i <= 1; i++) {       for (int j = -1; j <= 1; j++) {         if (i == 0 && j == 0) {           continue;         }         ans = min(ans, abs(x1 - (x2 + i)) + abs(y1 - (y2 + j)));       }     }     cout << 2 * ans + 8;   }   