How To Match Words In A List With User Input In Python?

I am working on program which takes user input and replaces the words in a list with 'x'. eg is the word is sucks and user input is 'this word is sucks'. the output should be 'thi

Solution 1:

def main():
    final_message = []
    words = ['drat','crap','sucks']
    counter = 0
    userInput = input("Enter The Sentense: ")  # use raw_input if you're using python2.X
    truncatedInput = userInput[:140]
    sentence =  truncatedInput.split()
    for word in sentence:
        if word in words:
            word = 'x' * len(word)
        final_message.append(word)
     print ' '.join(final_message)