cf 1428A

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define test int t; cin>>t; for(int cs=1;cs<=t;cs++)
int main()
{
   ios_base::sync_with_stdio(0);
   cin.tie(0);cout.tie(0);

   test
   {
       ll a,c,d,e,i,j,k,l;
       cin>>a>>c>>d>>e;
       k=abs(a-d);
       l=abs(c-e);
       if(k && l) cout<<k+l+2<<endl;
       else cout<<k+l<<endl;
   }


   return 0;
}