#include <bits/stdc++.h>
#pragma GCC optimize("-O2")
using namespace std;
void err(istream_iterator<string> it) { cerr << endl; }
template <typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {
  cerr << *it << " = " << a << "\t";
  err(++it, args...);
}
template <typename T1, typename T2>
ostream& operator<<(ostream& c, pair<T1, T2>& v) {
  c << "(" << v.first << "," << v.second << ")";
  return c;
}
template <template <class...> class TT, class... T>
ostream& operator<<(ostream& out, TT<T...>& c) {
  out << "{ ";
  for (auto& x : c) out << x << " ";
  out << "}";
  return out;
}
const int LIM = 2e5 + 5, MOD = 1e9 + 7;
const long double EPS = 1e-9;
int read() {
  int xx = 0, ff = 1;
  char ch = getchar();
  while (ch > '9' || ch < '0') {
    if (ch == '-') ff = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    xx = (xx << 3) + (xx << 1) + ch - '0';
    ch = getchar();
  }
  return xx * ff;
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int tests = 1;
  cin >> tests;
  while (tests--) {
    long long x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    if (abs(x1 - x2) == 0 || abs(y1 - y2) == 0) {
      cout << abs(x1 - x2) + abs(y1 - y2) << '\n';
    } else {
      long long l1 = abs(x1 - x2), l2 = abs(y1 - y2);
      cout << l1 + l2 + 2 << '\n';
    }
  }
  return 0;
}
