bad_words, new_words = {}, set()
lines = [line[:-1] for line in open('dictionary.txt')]

for line in lines:
    orig, replacements = line.split('->')
    bad_words[orig] = {word.strip() for word in replacements.split(',')}
    new_words.update(bad_words[orig])

highlight = {word for word in new_words if word in bad_words and word not in bad_words[word]}
for line in lines:
    if any(word in line for word in highlight):
        print(line)