['Agent', 'Wall', 'GoalTile', 'Lava', 'Key', 'Door', 'Box', 'Ball', 'left', 'right', 'forward', 'pickup', 'drop', 'toggle', 'done', 'pointing_right', 'pointing_down', 'pointing_left', 'pointing_up', 'go_to', 'step_towards', 'red_key', 'yellow_door', 'grey_door', 'red_door', 'green_door', 'purple_door', 'blue_door', 'agent', 'goal', 'is_on_a', 'at', 'at_any', 'in_inventory']