def doesItHalt(programString, dataString):

  #
  # thousands of hours of programmer effort
  # yielding lots of code that 
  #    1) reads and analyzes the programString argument
  #    2) reads and analyzes the dataString argument 
  # and perhaps does all kinds of computations, even
  # simulating the running of the program defined by 
  # programString on dataString, 
  # and then, finally, will

  # return Yes if the program encoded in programString stops
  # when given dataString as input
  return "Yes"
  
  #
  # return "No" otherwise
  #return "No"