#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n, i, x, ans;
  long long int a, b, c, d;
  cin >> a >> b >> c >> d;
  cout << max(a + b, c + d) << "\n";
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int t;
  cin >> t;
  while (t--) {
    solve();
  }
}
