You need to answer the question 'Are the given steps in order?', given a set of steps describing a process. Your answer must be either Yes or No. If the answer is No, that means the steps are out of order and do not make sense in the order they are in. If the answer is Yes, that means the steps are in order and make sense in the order that they are in. A set of steps are not in order if the steps reference information that is introduced in a later step

Example Input:  ['Water vapor joins the atmosphere', 'Living things produce waste', 'Water evaporates', 'Engines produce carbon dioxide', 'Decomposition produces methane', 'Carbon dioxide, water vapor and methane are greenhouse gases', 'Waste decomposes', 'People breathe and expel carbon dioxide'] 
Example Output:   No  

Example Input:  ['A circuit is completed between the batteries and the lamp', 'The flashlight is turned on', 'The beam is no longer visible.', 'Batteries are put in a flashlight', 'The reflector in the flashlight directs the lamp's beam', 'The circuit is broken', 'Two contact strips touch one another', 'A straight beam of light is generated', 'The lamp in the flashlight begins to glow', 'The flashlight is turned off'] 
Example Output:   No  

Example Input:  ['Air enters the nose or mouth and travels through the windpipe into the lungs', 'The lungs have a series of smaller and finer tubes and sacs', 'Air reaches the smallest and finest air sacs called alveoli', 'Oxygen travels from the alveoli into the blood', 'Oxygen-rich blood is carried to the heart', 'Oxygen-rich blood is pumped throughout the body by the heart', 'Cells take in the oxygen rich blood and release carbon dioxide rich blood', 'The carbon dioxide rich blood travels to the lungs', 'Carbon dioxide travels through the throat and is exhaled.'] 
Example Output:
  Yes