(Program
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    (Identifier))
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    (FunctionCall
    { (Identifier)
    ->(Identifier) }
      (Identifier)
      (Identifier))
    (FunctionCall
    { (Identifier)
    ->(Identifier) }
      (Identifier)
      (Identifier))
    (FunctionCall
    { (Identifier)
    ->(Identifier) }
      (Identifier)
      (Identifier))))