import string


def check_triangles(filename):
    """returns triangle words."""
    letter_scores = {letter: score for score, letter in enumerate(string.ascii_lowercase, 1)}
    words = open(filename, 'r').read()
    words = words.lower().split("",")
    temp = []
    for word in words:
        temp.append(word.replace(""", ''))
    word_scores = {word: sum(letter_scores[letter] for letter in word) for word in temp}
    maximum = max(word_scores.values())
    start_triangle = 2
    triangles = [1]
    while max(triangles) < maximum:
        triangles.append(triangles[-1] + start_triangle)
        start_triangle += 1
    return ((word, score) for word, score in word_scores.items() if score in triangles)


if __name__ == '__main__':
    print(len(set(check_triangles('p042_words.txt'))))