(Program
  (ExpressionStatements
    (FunctionCall
      (Identifier)
      (NumberLiteral)
    { (StringLiteral)
    ->(StringLiteral) }
      (Function
      { (Identifier)
      ->(Identifier) }
      { (Identifier)
      ->(Identifier) }
        (ExpressionStatements
          (ExpressionStatements
            (FunctionCall
              (Identifier)
              (Identifier)
            { (Identifier)
            ->(Identifier) }))
          (Return
          { (Identifier)
          ->(Identifier) })))
    { (Boolean)
    ->(Boolean) })))