from random import randint

def simuNiv2():
    tirage1 = randint(1, 7)
    if tirage1 <= 4:
        rep1 = "A"
        tirage2 = randint(1, 5)
        if tirage2 <= 3:
            rep2 = "C"
        else:
            rep2 = "D"
    else:
        rep1 = "B"
        tirage2 = randint(1, 3)
        if tirage2 == 1:
            rep2 = "C"
        else:
            rep2 = "D"
    return rep1, rep2