(Program
  (Package
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    ([])
    (
      (Call
        (Identifier)
        (SendChannel
        { (Identifier)
        ->(Identifier) })
        (Empty))
      (Call
        (Identifier)
        (
          (SendChannel
          { (Identifier)
          ->(Identifier) })
          (Minus
            (Identifier)
            (Identifier)))
        (Empty))
      (Call
        (Identifier)
        (
          (SendChannel
          { (Identifier)
          ->(Identifier) })
        { (Integer)
        ->(Integer) }
        { (Integer)
        ->(Integer) })
        (Empty))
      (Call
        (Identifier)
        (Map
        { (Identifier)
        ->(Identifier) }
        { (Identifier)
        ->(Identifier) })
        (Empty)))))