RPS problem

#main
def playRPS(userChoice):
    compChoice= generateCompChoice()
    determineWinner(compChoice,userChoice)
    printOutcome(userChoice, compChoice, determineWinner)

import random
def generateCompChoice():
# input nothing
    number=random.randint(0,2)
    if number ==0:
        return "rock"
    elif number ==1:
        return "paper"
    else:
        return "scissors"
# generates a random number (0,1,2)
# return number

# Determine the winner
# Input compChoice, userChoice
def determineWinner(compChoice, userChoice):
    if compChoice=="rock" and userChoice=="r" or compChoice == "paper" and userChoice == "p" or compChoice == "scissors" and userChoice== "s":
        return "tied"
    elif compChoice=="rock" and userChoice=="p" or compChoice=="paper" and userChoice=="s" or compChoice == "scissors" and userChoice == "r":
        return "won"
    else:
        return "lost"
def userInput(userChoice):
    if userChoice=="r":
        return "rock"
    elif userChoice=="p":
        return "paper"
    else:
        return "scissors"
def printOutcome(userChoice, compChoice, determineWinner):
    print("You chose"+ userInput(userChoice)+ "and the computer chose"+ generateCompChoice()+", so you"+determineWinner(compChoice, userChoice))

print("welcome to rock, paper, scissors!")
userChoice = input("choose your item [r/p/s]:")
playRPS(userChoice)