def vowel_indices(word):
    """
    We want to know the index of the vowels in a given word, for example, there are two vowels in the word super
    (the second and fourth letters).
    :param word: A string input.
    :return: a list of indices of the vowels.
    """
    return [i + 1 for i, j in enumerate(word) if j.lower() in "aeiouy"]