(Program
  (Module
    (Identifier))
  (Function
    (Identifier)
    (Args)
  {+(Slice
    {+(Identifier)+}
    {+(NumberLiteral)+})+}
  {+(Slice
    {+(Identifier)+}
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  {+(Slice
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    {-(NumberLiteral)-})-}
  {-(Slice
    {-(Identifier)-})-}
  {-(Slice
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    (Slice
      (Identifier)
      (NumberLiteral)
      (NumberLiteral))
    (Slice
      (Identifier)
      (NumberLiteral)
      (NumberLiteral))
    (Slice
      (Identifier)
      (NumberLiteral)
      (NumberLiteral)
      (NumberLiteral))))