#include <bits/stdc++.h>

using namespace std;

int main()
{


int t;
int c=0,c1=0;
cin>>t;
while(t--)
{

int x1,y1,x2,y2;
cin>>x1>>y1>>x2>>y2;

if(x1++==x2 && y1==y2)
cout<<"1"<<endl;
else if(y1++==y2 && x1==x2)
cout<<"1"<<endl;

else
{
while(x1!=x2)
{
 x1++;
 c++;
 //if(x1==x2)
 //break;
 //printf("c=%d ",c);
}

while(y1!=y2-1)
{
y1++;
c1++;

 //if(y1==y2)
 //break;
//cout<<"c="<<c1<<" ";
}

}


cout<<c+c1+3<<endl;


}




  return 0;
}
wht is wrong my code why it did not get ac ?