I'm a phyton begginer can someone answer this pls?

#Why does else statement don’t print with wrong inputs?
#Ai can’t answer me this
#How to print first else statement without finishing all inputs?

print(“Welcome to Python Pizza Deliveries!”)
size = input("What size pizza do you want? S, M or L: ").upper()
pepperoni = input("Do you want pepperoni on your pizza? Y or N: ").upper()
extra_cheese = input("Do you want extra cheese? Y or N: ").upper()

bill = 0
if size == “L”:
bill += 25
elif size == “M”:
bill += 20
elif size == “S”:
bill += 15
else:
print(“L, M, S answers only.”)

#Wait I just noticed now

Welcome to Python Pizza Deliveries!
What size pizza do you want? S, M or L: l
Do you want pepperoni on your pizza? Y or N: y
Do you want extra cheese? Y or N: n
L, M, S answers only.
Your Total Bill is: $0.

Process finished with exit code 0

#It printed only when it finishes all the inputs.