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

Input: Consider Input:  ['People breathe and expel carbon dioxide', 'Carbon dioxide, water vapor and methane are greenhouse gases', 'Water vapor joins the atmosphere', 'Living things produce waste', 'Decomposition produces methane', 'Waste decomposes', 'Engines produce carbon dioxide', 'Water evaporates'] 

Output:   No  


Input: Consider Input:  ['Bloodstream', 'Sugar enters the body', 'Insulin lower sugar levels', 'Bloo sugar goes back to normal.', 'The pancreas'] 

Output:   No  


Input: Consider Input:  ['A virus enters a host body', 'The virus has receptors that lock onto a target cell', 'The virus enters the cell', 'The virus uses the cell like a factory to make new copies of the virus', 'The new copies of the virus leave the cell', 'Infect other cells', 'The host gets sick as its cells are damaged.'] 


Output:   Yes