def build_simplification_str(args):
    """ Build simplification_str from args. """
    simplifications = set()
    if args["teleport"]:
        simplifications.add("teleportAction")

    if args["self_watering_plants"]:
        simplifications.add("selfWateringFlowerPots")

    if args["open_containers"]:
        simplifications.add("openContainers")

    if args["open_doors"]:
        simplifications.add("openDoors")

    if args["no_electrical"]:
        simplifications.add("noElectricalAction")

    return args["simplifications_preset"] or ",".join(simplifications)