input: Write a function to determine if any two numbers in a given list add up to a specific value. If they do, return True; otherwise, return False. If the list is empty, return False.
  
  def two_sum(numbers, given):
      for i in range(len(numbers)):
          for j in range(i+1, len(numbers)):
              if numbers[i] + numbers[j] == given:
                  return True
      return False
  
  assert two_sum([1, 2, 3, 4], 5) == True
  assert two_sum([1, 3, 5, 7], 8) == True
  assert two_sum([2, 4, 6, 8], 11) == False
  assert two_sum([], 10) == False
output: def two_sum(numbers, given):
      for i in range(len(numbers)):
          for j in range(i+1, len(numbers)):
              if numbers[i] + numbers[j] == given:
                  return True
      return False