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:  ['The gravity of the sun pulls its mass inward', 'There is a lot of pressure on the Sun', 'The pressure forces atoms of hydrogen to fuse together in nuclear reactions', 'The energy from the reactions gives off different kinds of light', 'The light travels to the Earth.'] 

Output:   Yes  


Input: Consider Input:  ['You place aluminum cans and other products into recycling bins', 'Your town or a private company collect and transport the aluminum to a recycling facility', 'The aluminum is sorted and cleaned at the central recycling facility', 'The aluminum is melted down to remove coatings and inks', 'The melted aluminum is formed into large formations called ingots', 'The ingots are transported to another facility and rolled out to make them easier to manipulate', 'The ingots can now be turned into new aluminum products.'] 

Output:   Yes  


Input: Consider Input:  ['Oxygen is transferred to red blood cells', 'Red blood cells distribute oxygen throughout the body', 'The lungs expand', 'The diaphragm contracts', 'The membranes in the lungs collect oxygen molecules', 'Air is pulled from outside the body, into the lungs'] 


Output:   No