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:
 ['A photovoltaic cell is created with two layers of semiconductor material', 'The top layer are &#x27;doped&#x27; with impurities to allow a negative charge', 'The bottom layer are &#x27;doped&#x27; to allow for a positive charge', 'This produces an electric field that allows electrons to flow from negative to positve', 'Sunlight enters the cell', 'Energy from sunlight knocks electrons loose in both fields', 'This prevents the flow of electrons from negative to positive', 'Adding an external circuit allows the exchange to continue', 'Give the cells owner a flow of electricity.'] 

Ex Output:
  Yes  


Ex Input:
 ['The colder air at the top is pushed to the bottom', 'The heat is trapped in the greenhouse', 'The plants and floor absorb the the sunlight', 'Sunlight passes through the glass into the greenhouse', 'The colder air is then warmed by the floor and the plants.', 'The heat cannot escape the glass', 'The hot air rises', 'The absorbed sunlight is converted to heat'] 

Ex Output:
  No  


Ex Input:
 ['The electron is released', 'The nuclei of some atoms have too few or too many neutrons', 'In beta decay, a neutron changes into a proton and an electron', 'The atoms split', 'The atoms become unstable', 'In alpha decay, two protons and two neutrons are released from the atom', 'The proton joins the nucleus of the atom'] 

Ex Output:

  No