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: Consider Input: Steps: (1) A larva is born (2) The caterpillar eats constantly until it grows bigger (3) The caterpillar starts to form a cocoon around itself (4) After some time the cocoon hatches (5) And a butterfly is born.  
Where does the following step fit into the given list of steps: The caterpillar becomes a pupa 

Output:  After step 3. 


Input: Consider Input: Steps: (1) Networks of trees start forming (2) The dead material provides nutrients for more trees (3) The rising trees provide shelter (4) And more organisms begin to thrive (5) The ecosystem known as a forest is made.  
Where does the following step fit into the given list of steps: The trees die off 

Output:  After step 1. 


Input: Consider Input: Steps: (1) Air goes into the lungs (2) Oxygen diffuses from alveoli in the lungs to the bloodstream (3) Hemoglobin in red blood cells attaches to the oxygen (4) Red blood cells carry oxygen all around the body (5) Oxygen diffuses into cells from capillaries.  
Where does the following step fit into the given list of steps: The lungs remove oxygen from the air 


Output:  After step 1.