(Program
  (Comprehension
    (KeyValue
    { (Identifier)
    ->(Identifier) }
    { (Identifier)
    ->(Identifier) })
    (
      (
        (
        { (Identifier)
        ->(Identifier) })
      { (Identifier)
      ->(Identifier) })
    {-(
      {-(Identifier)-})-}))
  (Comprehension
    (KeyValue
    { (Identifier)
    ->(Identifier) }
    { (Integer)
    ->(Identifier) })
    (
      (
        (
        { (Identifier)
        ->(Identifier) })
      { (Identifier)
      ->(Identifier) })
    {+(
      {+(Identifier)+})+})))