Regex / Replacing Text Issue in Python

I am trying to find the words NOUN|ADJECTIVE|VERB in the file, and then prompt the user to enter new words and replace the words with the user input, which I'll write to a new text file.

It almost works, but the text file I am using (which has 2 nouns) prompts the user for both of the 2 nouns, yet whatever the input for the first NOUN was is outputted in both noun positions in the file.

For example:

Please enter a: ADJECTIVE
blue

Please enter a: NOUN
cup

Please enter a: VERB
go

Please enter a: NOUN
coat

The blue panda walked to the cup and then go. A nearby cup was unaffected by these events.

pattern = re.compile(r'(NOUN|ADJECTIVE|VERB)') #sets pattern
with open('story.txt', 'r') as f: #opens file to read
    contents = f.read() #assigns readable info to variable
    matches = pattern.findall(contents) #makes list of matches
for match in matches: #iterate over every match
    cual = str(match) 
    print("Please enter a:", cual) 
    replacement = input() #get input to replace the match
    contents = contents.replace(match, replacement) #replace with input
f.close() 
with open('story2.txt', 'w') as g: #write new text into new file
    g.write(contents)
g.close()
with open('story2.txt', 'r') as f:
    finished = f.read()
    print(finished) #print new text