Letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" Num = "123456789" 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 (code)