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:  ['The lungs oxygenate the blood in the body', 'Carbon dioxide is filtered out by every cell in the body', 'Air is taken into the body via the nose or mouth', 'The air travels into the windpipe', 'The carbon dioxide is carried back to the lungs via the bloodstream', 'The carbon dioxide is exhaled.', 'The windpipe divides the air to the two lungs via the bronchial tubes'] 
Example Output:   No  

Example Input:  ['It passes through vessels in the stem on its way to the leaves', 'Water is absorbed by the roots', 'These pores are called stomata', 'Carbon dioxide from the air passes through small pores (holes) in the leaves', 'Sunlight is absorbed by a green chemical in the leaves.'] 
Example Output:   No  

Example Input:  ['Air is brought in through the mouth', 'Passes through the lungs', 'And into the bronchial tissue', 'The carbon dioxide is removed', 'The lungs bring the oxygen to the rest of the body.'] 
Example Output:
  Yes