import random

# 1. Generate two random single-digit integers
number1 = random.randint(0, 9)
number2 = random.randint(0, 9)

# 2. If number1 < number2, swap number1 with number2
if number1 < number2:
    number1, number2 = number2, number1

# 3. Prompt the student to answer What is number1 - number2?
answer = eval(input("What is " + str(number1) + " - " 
    + str(number2) + "? "))

# 5. Repeatedly ask the user the question until it is correct
while number1 - number2 != answer:
    answer = eval(input("Wrong answer. Try again. What is " 
        + str(number1) + " - " + str(number2) + "? "))
  
print("You got it!")