dotsfile = open('dots.txt', 'r')
wantedfile = open('wanted.txt', 'r')
keywordsfile = open('keywords.txt', 'w')
instructionsfile = open('instructions.txt', 'r')

def commandStrip(sentence):
    for line in dotsfile:
        line=line.strip('\n').replace(line, "")
    return sentence

def searchKeyWords(sentence):
    found = []
    for line in wantedfile:
        line=line.strip('\n')
        if sentence.find(line) >= 0:
            found.append(line)

    if found:
        return found
    return 1

def saveKeyWords(array):
    for line in array:
         keywordsfile.write(line)
         keywordsfile.write("\n")

saveKeyWords(searchKeyWords(commandStrip(instructionsfile.read())))

dotsfile.close()
wantedfile.close()
keywordsfile.close()
instructionsfile.close()