labels = {1: 'aggregate', 2: 'boiler', 3: 'solar',
          4: 'laptop', 5: 'washing_machine', 
          6: 'dishwasher', 7: 'tv', 8: 'kitchen_lights',
          9: 'htpc', 10: 'kettle', 11: 'toaster', 
          12: 'fridge', 13: 'microwave', 14: 'lcd_office',
          15: 'hifi_office', 16: 'breadmaker', 
          17: 'amp_livingroom', 18: 'adsl_router', 
          19: 'coffee'}
