letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

numbers = "0123456789"

for l1 in letters: for l2 in letters: for l3 in letters: for l4 in letters: for n1 in numbers: for n2 in numbers: for n3 in numbers: plate = l1 + l2 + l3 + l4 + n1 + n2 + n3 print(plate)

Quadratic Formula x = (-b ± sqrt(b² - 4ac)) / 2a