def not_primes(a, b):
    new = []
    correct = ["2", "3", "5", "7"]
    flag = False
    for x in range (a, b):
        flag = False
        for c in range (0, (len(str(x)))):
            print(c)
            hold = str(x)
            if hold[c] not in correct:
                flag = True
        if not flag:
            new.append(x)
    return new