Definition: Given a list of steps and an additional step, determine where the step fits into the original list of steps. A correct answer, correctly places the given step into the set of steps so that it creates a new plausible set of steps. Output must be formatted as 'After step n', where n is the step number after which the given additional step is to be inserted.
Input: Steps: (1) A person takes in oxygen through their nose or mouth (2) The oxygen travels into the body (3) Carbon dioxide is produced by the glucose breakdown (4) The carbon dioxide is exhaled out of the body through the nose or mouth.  
Where does the following step fit into the given list of steps: Breaks down into glucose 
Output:
 After step 2. 