#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin >> t;
while (t--) {
int n, m, x, y;
cin >> n >> m >> x >> y;
cout << min(2 * n - x - 1, 2 * m - y - 1) << '\n';
}
return 0;
}
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