import sys
import string
import random

LETTERS = string.uppercase[:int(sys.argv[1])]
DIGITS = random.randint(0, int(sys.argv[2])]

winners = list()


try:

    while True:
        print raw_input("the next winner is...")
        winner = "".join((random.choice(LETTERS), random.choice(DIGITS)))
        print winner
        winners.append(winner)

except KeyboardInterrupt:
    print "Fin du tirage, rappel des winners:"
    print ", ".join(winners)