def Outcome():
    # check all combinations
    if c1 == c2:
      print('Tie!')
    elif ((c2== 'Rock' and c1 == 'Paper') or
          (c2== 'Paper' and c1 =='Scissors') or
          (c2== 'Scissors' and c1 == 'Rock')):
        print('Player 1 wins!' )
    elif ((c1== 'Rock' and c2 == 'Paper') or
          (c1== 'Paper' and c2 =='Scissors') or
          (c1== 'Scissors' and c2 == 'Rock')):
        print ('Player 2 wins!')

while True:
    n = 0
    while n<3:
        while True:
            # ask for user input
            c1 = input ("Player 1: Rock, Paper, or Scissors? ")
            if c1 == 'Rock' or c1 == 'Paper' or c1 =='Scissors' :
              break  # check passed
            print("Invalid input")
        while True:
            c2 = input("Player 2: Rock, Paper, or Scissors? ")
            if c2 == 'Rock' or c2=='Paper' or c2 == 'Scissors':
                break
            print("Invalid input")
        n += 1  # increment counter by 1
        Outcome()  # call outcome function
    Game = input("Would you like to play again? ")
    if Game == 'n' or Game == 'N'or Game == 'no' or Game == 'No':
      break