input: Write a python function to check if a number is greater than 10 and print "Success!" if it is, otherwise print "Failed!".
  assert check_num(7) == "Failed!"
  assert check_num(15) == "Success!"
  assert check_num(10) == "Failed!"
output: def check_num(n):
      if n > 10:
          return "Success!"
      else:
          return "Failed!"