input: Write a function to determine the winner in a game of Rock, Paper, Scissors.
  assert determine_outcome('Rock', 'Scissors') == 'Rock'
  assert determine_outcome('Paper', 'Rock') == 'Paper'
  assert determine_outcome('Scissors', 'Paper') == 'Scissors'
  assert determine_outcome('Scissors', 'Rock') == 'Rock'
  assert determine_outcome('Rock', 'Paper') == 'Paper'
output: def determine_outcome(player1, player2):
      if player1 == player2:
          return "Tie"
      elif (player1 == 'Rock' and player2 == 'Scissors') or \
           (player1 == 'Scissors' and player2 == 'Paper') or \
           (player1 == 'Paper' and player2 == 'Rock'):
          return player1
      else:
          return player2