"it 's a chit to say you 're officially alive , just in case you run into any trouble . you know ... with people . ' thank you , ' said dorfl solemnly . ' if ever i feel i am not alive , i will take this out and read it . ' ' what are your duties ? ' said vimes . ' to serve the public trust , protect the innocent , and seriously prod buttock , sir , ' said _ ..." What is the word in the blank space (_)? The answer is
dorfl