def get_heat_required_input(data):
    """Returns Heat required user input fields."""
    heat_params = []
    heat_param_dict = data["parameters"]
    for key, heat_param in heat_param_dict.items():
        heat_params.append([key,
                            heat_param.get("type"),
                            heat_param.get("default"),
                            heat_param.get("description")])
    return sorted(heat_params)