ProgramNode(0...13)(
  [],
  StatementsNode(0...13)(
    [RangeNode(0...3)(IntegerNode(0...1)(), nil, (1...3), 0),
     RangeNode(6...9)(
       CallNode(6...7)(nil, nil, (6...7), nil, nil, nil, nil, 0, "a"),
       nil,
       (7...9),
       0
     ),
     CallNode(12...13)(nil, nil, (12...13), nil, nil, nil, nil, 0, "c")]
  )
)
