#include <bits/stdc++.h>   using namespace std;   int main() {     int t;     scanf( %d , &t);     while (t--) {       long long x1, y1, x2, y2;       scanf( %lld%lld%lld%lld , &x1, &y1, &x2, &y2);       long long lenx = abs(x1 - x2);       long long leny = abs(y1 - y2);       long long ans = lenx + leny;       if (lenx && leny) ans += 2;       printf( %lld n , ans);     }     return 0;   }   