Untitled

def rem_one(text, pat):
    new_text = []
    for word in text.split(' '):
        new_w = []
        for w in word.split('\n'):
            if re.match(pat, w.lower()):
                new_w += [re.sub(pat, '', w.lower())]
            else:
                new_w += [w]
        new_text += ['\n'.join(new_w)]
    return ' '.join(new_text)


import re
def remq(fstr1, fstr2, fstr3):
    with (open(fstr1, mode='r') as f1,
          open(fstr2, mode='r') as f2,
          open(fstr3, mode='w') as f3):
        text = f1.read()
        inappr = f2.read().split()
        new_text = text
        for i in inappr:
            new_text = rem_one(new_text, i)
        f3.write(new_text)


remq('tmp1.txt', 'tmp.txt', 'output.txt')