#include <bits/stdc++.h>

using i64 = long long;

void solve() {
    int a, b, c, d;
    std::cin >> a >> b >> c >> d;
    
    if (a > b) {
        std::swap(a, b);
        std::swap(c, d);
    }
    
    int ans = 0;
    if (c > d) {
        if (c < a) {
            std::cout << 1 + c + 1 + d << "\n";
            return;
        }
        b = 0;
        ans++;
        std::swap(a, b);
        std::swap(c, d);
    }
    
    if (a <= c && b <= d) {
        ans += c - a;
    } else {
        ans += c + 1;
        if (a == 1) {
            ans++;
        }
    }
    if (b <= d) {
        ans += d - b;
    } else {
        ans += d + 1;
    }
    
    std::cout << ans << "\n";
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    
    int t;
    std::cin >> t;
    
    while (t--) {
        solve();
    }
    
    return 0;
}