!7

p-exp {
  for (int b : ll(-3, 3))
    for (int a = -7; a <= 7; a++) {
      int x = a < 0 ? b - (-a) % b : a % b;
      int y = mod(a, b);
      if (x != y)
        printStructs(+a, +b, +x, +y);
    }
}