#include <cstdio>
long long n, x1, y1, x2, y2;

inline long long calc(long long x){
  long long a, rx, ry;
  a = x - x1;
  if(a <= y2){
    rx = x1;
    ry = a;
  }
  else{
    ry = y2;
    rx = x - y2;
  }
  if(ry - y1 + 1 < x2 - rx + 1)
    return ry - y1 + 1;
  else
    return x2 - rx + 1;
}

int main(){
  FILE *in = fopen("fibo3.in", "r");
  FILE *out = fopen("fibo3.out", "w");
  long long rez, a, b;
  fscanf(in, "%lld", &n);
  for(; n > 0; n--){
    fscanf(in, "%lld%lld%lld%lld", &x1, &y1, &x2, &y2);
    a = 1;
    b = 2;
    rez = calc(1);
    while(b <= x2 + y2){
      rez += calc(b);
      b = a + b;
      a = b - a;
    }
    fprintf(out, "%lld\n", rez);
  }
  fclose(in);
  fclose(out);
  return 0;
}