input: from typing import List
  
  def suggest_sum_lambda(a: int, b: int) -> int:
      """ Suggest a valid Python syntax to calculate the sum of two variables using lambda
      >>> suggest_sum_lambda(3, 4)
      7
      >>> suggest_sum_lambda(5, 5)
      10
      """
      sum_lambda = lambda a, b: a + b
      return sum_lambda(a, b)
output:     sum_lambda = lambda a, b: a + b
      return sum_lambda(a, b)