The FIREBALL number replaces any of the numbers drawn in the Pick 4 drawing. For example, if the drawn numbers are “1, 2, 3, 4” and the drawn FIREBALL number is “5”, the FIREBALL number creates three new combinations of “5, 2, 3, 4”, “1, 5, 3, 4”, “1, 2, 5, 4”, and “1, 2, 3, 5”.