#include <bits/stdc++.h>

using namespace std;
#define int long long
int32_t main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int t;cin>>t;
    while(t--)
    {
        int a,b,c,d;cin>>a>>b>>c>>d;
        int ans=0;
        if(a>c) {a=0;++ans;}
        if(b>d) {b=0;++ans;}
        if(a==0 && b==0)
        {
            cout<<c+d+ans<<'\n';continue;
        }
        else if(a==0)
        {
            if(d>c) {cout<<ans+d-b+c<<'\n';continue;}
            else {cout<<ans+1+c+d+(b==1)<<'\n';continue;}
        }
        else if(b==0)
        {
            if(c>d) {cout<<ans+d-a+c<<'\n';continue;}
            else {cout<<ans+1+c+d+(a==1)<<'\n';continue;}
        }
        else if(((a>b)^(c>d))==1)
        {
            cout<<max(1+c+d-b,1+d+c-a)<<'\n';continue;
        }
        else
        {
            cout<<c+d-a-b<<'\n';continue;
        }
    }
    return 0;
}