If I understand the correct output format word-O, you can try something like this:
words = open('filename').read().split()
labeled_words = [word+"-O" for word in words]
# And now user your output format, each word a line, separate by tabs, whatever.
# For example new lines
with open('outputfile','w') as output:
output.write("\n".join(labeled_words))
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solved How to add a label to all words in a file? [closed]