Why this loop stops before it finishes?

I have some problems with this small program for rolling two dices.

Why the program stops before it finishes the loop and instead it asks a loop times "do you want to play again?"

Thank you for your help!

#Program which simulates the rolling of two dice

import random

def rolling_dices(repetitions):
    a = repetitions
    b = 1
while b <= a:
    i = (random.randrange(1,7))
    y = (random.randrange(1,7))
    b +=1
    print(i, y, "\t =>", int(i+y))

    answer = input("do you want to play again? (Y/N)")
    if answer.lower() == "y":
        continue
    else:
        break


rolling_dices(5)