def get_my_guess(num_people,
                 num_days=365):
    """
    Compute my initial guess of the consecutive birthdays probability
    """
    left_result = 1 - (num_people - 1) / float(2 * num_days + num_people - 1)
    right_result = 1
    for i in range(num_people):
        right_result *= (num_days - 2 * i) / float(num_days)
    guess = left_result * (1 - right_result)
    print("Number of people: {}\tMy guess: {:2.5%}".format(num_people, guess))
    return guess