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

Ex Input:
 ['Coal is burned', 'Sulfur in the coal combines with oxygen to form sulfur oxides', 'The sulfur oxides are released into the atmosphere', 'The sulfides combine with oxygen in the atmosphere to form sulfur trioxide', 'The sulfur trioxide reacts with water in the atmosphere to form sulfuric acid, a very strong acid', 'The sulfuric acid makes the rain acidic'] 

Ex Output:
  Yes  


Ex Input:
 ['The sediment travels along the same route as the wind or water', 'The sediment is deposited again in a new place.', 'The sediment breaks down into small particles', 'The sediment is picked up again by new wind or water', 'The sediment is deposited at new locations by the wind or water', 'Sediment settles in a place due to gravity', 'Wind or water picks up the sediment', 'The sediment travels further'] 

Ex Output:
  No  


Ex Input:
 ['Owls hunt around their hunting territory away from where they roost during the day', 'They sit still on a perch, like a stump of branch, and wait for prey', 'They use their highly sensitive hearing to locate prey that cannot be seen', 'They use their very keen vision to see prey in the dark', 'They fly silently, without flapping their wings, in order to surprise the prey', 'The owl silently glides or drops on its prey, grabbing it with its talons and beak', 'The owl eats the prey, or carries it back to its perch'] 

Ex Output:

  Yes