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) Blood carried into kidney by the renal artery (2) Nephrons in the kidney filter the blood (3) Become urine (4) Ureters carry urine out of the kidneys.  
Where does the following step fit into the given list of steps: The waste that is filtered out mixes with water 

Output:  After step 2. 


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) Water in the clouds becomes very cold (2) The cold water forms ice crystals (3) Form snowflakes (4) The snowflakes fall to the ground.  
Where does the following step fit into the given list of steps: The ice crystals grow by absorbing surrounding water droplets 


Output:  After step 2. 


