def extraNumber(a, b, c):
    numbers = sorted([a, b, c])
    if numbers[0] == numbers[1]:
        return numbers[2]
    return numbers[0]

1df66e095f1d211bc683e1aaeac5696e10f1ad99
<mask token>

def extraNumber(a, b, c):
    numbers = sorted([a, b, c])
    if numbers[0] == numbers[1]:
        return numbers[2]
    return numbers[0]
