Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Steps: (1) Oxygen moves from the lungs into the bloodstream (2) Air is pushed through the vocal chords (3) A person talks (4) Other air is pushed out of the lungs into the environment.  
Where does the following step fit into the given list of steps: Air is pulled into the lungs 
Student:
 Before step 1. 