Multiple inputs from a user in a single line for pythong

With python you have input() it takes one user input and you can assign it to a variable and then do what you please. I have heard about the .split() method but don't know how to implement it into my code. I want to create a function use def() so i can call back the function several times while asking the user for input as to whether they want to got through with the process, end it or do another function

print("Hello, welcome to the change calculator")
print("Here we will ask you to tell us the amount of each individual coins you have")
#create variables that hold the amount each one states such as five pence would == £0.05
fivepence = 0.05
tenpence = 0.10
twentypence = 0.20
fiftypence = 0.50
onepound = 1
twopound = 2
#Get the user to input everything 



fivepencetotal = input(("How many 5 Pence coins do you have? : ")) * fivepence

tenpencetotal = input(("How many 10 Pence coins do you have? : ")) * tenpence

twentypencetotal = input(("How many 20 Pence coins do you have? : ")) * twentypence

fiftypencetotal = input(("How many 50 pence coins do you have? : ")) * fiftypence

onepoundtotal = input(("How many 1 Pound coins do you have? : ")) * onepound

twopoundtotal = input(("How many 2 pound coins do you have? : ")) * twopound


#function to add everything and do the opposite if that is what the user wants

def changeaddup():
    print("do you want to add everything up?")
    print("Type either Yes, yes , Y or y to add all your change up")
    if input( "Yes","yes","Y","y"):
        print("Just calculating how much money you have based on the data you have inputed")
        print("Here you have a total of £", fivepencetotal + tenpencetotal + twentypencetotal + fiftypencetotal + onepoundtotal + twopoundtotal)
        
    else:
        return
print(changeaddup)

Dont exactly know what you want, but may be something like this

positive_choice_options = ["Yes","yes","Y","y"]

# and there can be other choice if you need. ie.
negetive_choice_options = ["No", "no", "N", "n"]

def normalized_user_choice(user_choice):
    if user_choice in positive_choice_options:
        return "yes"
    if user_choice in negetive_choice_options:
        return "no"

def changeaddup():
    print("do you want to add everything up?")
    user_choice = input("Type either Yes, yes , Y or y to add all your change up: ")
    if normalized_user_choice(user_choice)=="yes":
        print("Just calculating how much money you have based on the data you have inputed")
        print("Here you have a total of £", fivepencetotal + tenpencetotal + twentypencetotal + fiftypencetotal + onepoundtotal + twopoundtotal)
    else:
        return