def right_word(lists, number):
    right_list = []
    for list in lists:
        if(len(list) == number):
            right_list.append(list)
    return right_list

print(right_word(['Girl', 'Boy', 'Baby', 'Sue', 'Man'], 3))

#Second Way

def right_word(lists, number):
    def func(list):
        return len(list) == number

    print(list(filter(func, lists)))

print(right_word(['Girl', 'Boy', 'Baby', 'Sue', 'Man'], 3))