Lingo sample runs

$ python3 lingo.py
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Welcome to Lingo!
  Each turn you will try to guess the secret word
  If you guess the word, you win
  If you guess some letters in the word, lingo will display:
    guessed letters in the correct position in upper case
    guessed letters in the incorrect position in lower case
Good Luck!
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word: - - - - -
Guess a 5 letter word: stack

word: s - a - k
Guess a 5 letter word: model

word: - - - - l
Guess a 5 letter word: lakes

word: l A k - S
Guess a 5 letter word: walks

word: - A L K S
Guess a 5 letter word: balks
You guessed the word balks in 5 tries
Congratulations!

$ python3 lingo.py
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Welcome to Lingo!
  Each turn you will try to guess the secret word
  If you guess the word, you win
  If you guess some letters in the word, lingo will display:
    guessed letters in the correct position in upper case
    guessed letters in the incorrect position in lower case
Good Luck!
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word: - - - - -
Guess a 5 letter word: grumble
Invalid input. Enter a word with 5 characters. Try again...
Guess a 5 letter word: wee
Invalid input. Enter a word with 5 characters. Try again...
Guess a 5 letter word: wawas
wawas is not a valid word. Try again...
Guess a 5 letter word: stack

word: - - - - -
Guess a 5 letter word: model

word: - o - - L
Guess a 5 letter word: funny

word: - u - - -
Guess a 5 letter word: cloud

word: - l O U -
Guess a 5 letter word: ghoul
You guessed the word ghoul in 5 tries
Congratulations!

$ python3 lingo.py
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Welcome to Lingo!
  Each turn you will try to guess the secret word
  If you guess the word, you win
  If you guess some letters in the word, lingo will display:
    guessed letters in the correct position in upper case
    guessed letters in the incorrect position in lower case
Good Luck!
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word: - - - - -
Guess a 5 letter word: stack

word: S - - - -
Guess a 5 letter word: model

word: - - d e -
Guess a 5 letter word: sends

word: S E - D S
Guess a 5 letter word: QUIT
The word you were trying to guess was: seeds
Better luck next time!