answer = 'Y','N'
answer = input("Are you ready to start the subject quiz? ")
if answer == "Y":
    print("Let's start!")
elif answer == "N":
    print("Please close the quiz!")
question1 = 'Y','N'
question1 = input("Do you like Computer Science? ")
if question1 == "Y":
    print("Excellent answer, next question!")
elif question1 == "N":
    print("Oh Dear!")
question2 = 'Y','N'
question2 = input("Do you like Science? ")
if question2 == "Y":
    print("Excellent answer, next question!")
elif question2 == "N":
    print("Oh Dear!")
question3 = 'Y','N'
question3 = input("Do you like English? ")
if question3 == "Y":
    print("Excellent answer, next question!")
elif question3 == "N":
    print("Oh Dear!")