Incorrect answer of the same guess in `hangman` game keeps on using my available tries

[JeffinsonDarmawan]

When I input a wrong guess for the first time, I am supposed to use one of my tries. However, when I input the same guess the second time, it seems that I keep on using my tries.

I was under the impression that the programme is expected to perform this way, where if an input of the same alphabets have been made, the programme will say you've already guessed this before.

[nus-pe-script]

Your response not required for this bug as the team has accepted the bug as it is.