text: #!/usr/bin/python3.4
  
  '''
  Display any number of sum problems with a function.
  Handle keyboard input separately.
  '''
  
  
  def sum_problem(x, y):
      nsum = x + y
      sentence = 'The sum of {} and {} is {}.'.format(x, y, nsum)
      print(sentence)
  
  
  def main():
      sum_problem(2, 3)
      sum_problem(1234567890123, 535790269358)
      a = int(input("Enter an integer: "))
      b = int(input("Enter another integer: "))
      sum_problem(a, b)
  
  
  main()
  