input: Write a python function to check if two values are equal and print a message if they are.
  assert check_equality(5, 5) == "A is equal to B"
  assert check_equality(3, 3) == "A is equal to B"
  assert check_equality(10, 10) == "A is equal to B"
output: def check_equality(a, b):
      if a == b:
          return "A is equal to B"