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:  ['Pollution enters natural water sources such as rivers and lakes', 'The pollution negatively affects the water quality', 'The pollution negatively affects the health of plants and animals', 'The plants and animals have shorter, less healthy lives', 'The plants and animals do not reproduce very well', 'The number of plants and animals decreases over time', 'The quality of water gets worse and worse as there are no plants or animals to clean it', 'Eventually there is nothing living in the water and it is unusable'] 

Output:   Yes  


Input: Consider Input:  ['The sediment can help erode land like sandpaper', 'Waves have energy that pushes the water and sediment', 'Some sediment is left as sand.', 'Water washes the sediment back', 'Waves hit the coast'] 

Output:   No  


Input: Consider Input:  ['The sediment can help erode land like sandpaper', 'Waves have energy that pushes the water and sediment', 'Some sediment is left as sand.', 'Water washes the sediment back', 'Waves hit the coast'] 


Output:   No