import std.stdio;
import std.string;
import std.conv;
import std.math;

void main(){
  auto T = readln.chomp.to!int;
  for(auto t = 0; t < T; t++){
    auto s = readln.chomp.split.to!(int[]);
    int a,b,c,d;
    if(s[0] < s[1]){
      a = s[0];
      b = s[1];
      c = s[2];
      d = s[3];
    }else{
      a = s[1];
      b = s[0];
      c = s[3];
      d = s[2];
    }
    if(b <= d){
      if(c < d){
        if(a <= c){
          writeln((d - b) + (c - a));
        }else{
          writeln((d - b) + (1 + c));
        }
      }else{
        writeln((c - a) + (1 + d));
      }
    }else{
      if(c < d){
        if(a == 1){
          writeln((1 + d) + (1 + c) + 1);
        }else{
          writeln((1 + d) + (1 + c));
        }
      }else{
        if(a <= c){
          writeln((1 + d) + (c - a));
        }else{
          writeln((1 + d) + (1 + c));
        }
      }
    }
  }
}