end {
  @a[1][1] = 1;
  @a[1][2] = 2;
  @a[2][1] = 3;
  @a[2][2] = 4;
  @a[3] = 10;
  @a[4] = 11;
  @a[5][6][7] = 12;
  @b[1][1] = 5;
  @b[1][2] = 6;
  @b[2][1] = 7;
  @b[2][2] = 8;
  emit (@b, @a), "s", "t"
}
