A.cpp

/*
    Author: saiyan_01
    Problem Statement : https://codeforces.com/contest/1428/problem/A
*/

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

#define ll long long
#define mp make_pair
#define pb push_back
#define mod 1000000007
#define e "\n"
#define len(x) x.size()
#define gcd(a, b) __gcd(a, b)
#define ste(v) v.begin(), v.end()
#define stea(arr, n) arr, arr+n


void solve(){
    // Solve here
    ll a, b, c, d;
    cin>>a>>b>>c>>d;

    ll x = abs(a-c);
    ll y = abs(b-d);

    ll ans;
    if (a == c || b == d){
        cout <<abs(a-c)+abs(b-d)<< '\n';
    } else cout << abs(a-c)+abs(b-d)+2<<e;

}

int32_t main() {

    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    ios::sync_with_stdio(0);
    cout.tie(0);
    cin.tie(0);
    int t;
    cin>>t;
    while(t--){
        solve();
    }
    return 0;
}