ProgramNode(0...33)(
  [],
  StatementsNode(0...33)(
    [CallNode(0...1)(nil, nil, (0...1), nil, nil, nil, nil, 0, "a"),
     CallNode(2...3)(nil, nil, (2...3), nil, nil, nil, nil, 0, "b"),
     CallNode(32...33)(nil, nil, (32...33), nil, nil, nil, nil, 0, "c")]
  )
)
