def Pluralize(count, singular='', plural='s'):
  """Return the pluralization suffix for "count" item(s). For example:
       'item' + Pluralize(1) = 'item'
       'item' + Pluralize(2) = 'items'
       'activit' + Pluralize(1, 'y', 'ies') = 'activity'
       'activit' + Pluralize(0, 'y', 'ies') = 'activities'
  """
  return singular if count == 1 else plural