(Program
  (Module
    (Identifier))
  (Function
    (Empty)
    (Identifier)
    (Match
      (Pattern
        (LessThan
        { (Identifier)
        ->(Identifier) }
        { (Identifier)
        ->(Identifier) })
        (Call
          (Identifier)
          (Empty)))
      (
        (Pattern
          (LessThan
          { (Identifier)
          ->(Identifier) }
          { (Identifier)
          ->(Identifier) })
          (Call
            (Identifier)
            (Empty)))
        (Pattern
          (Equal
          { (Identifier)
          ->(Identifier) }
            (Integer))
          (Call
          { (Identifier)
          ->(Identifier) }
            (Empty)))))))