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.
One example is below.
Q: Steps: (1) Solar radiation reaches Earth's atmosphere (2) Some is reflected back into space (3) The rest of the energy is absorbed by land and oceans, heating the Earth (4) Some of this heat is trapped by greenhouse gases in the atmosphere (5) Human activities such as burning fuel are increasing the amount of greenhouses gases (6) This causes more heat radiation to stay trapped in our atmosphere (7) The Earth's temperature rises  
Where does the following step fit into the given list of steps: Heat radiates from Earth to space 
A:  After step 3. 
Rationale: The correct answer is 'After step 3'. The given step is 'Heat radiates from Earth to Space'. Step 3 introduces a new concept of generated heat. Step 4 mentions that the heat is trapped into the atmosphere. In order for the heat to get to the atmosphere, the heat must radiate from Earth to space. Therefore, the correct answer is 'After step 3.'
Q: Steps: (1) Food is put into mouth (2) Food is chewed and mixed with saliva (spit) (3) Food travels down the esophagus (throat) (4) Food travels into the stomach (5) Acid in the stomach breaks the food down further (6) Food travels into the small intestine (7) Nutrients from food are absorbed into the blood stream (8) Most of the remaining material is now waste (9) The waste is eventually removed from the body.  
Where does the following step fit into the given list of steps: Food travels into the large intestine 
A:
 After step 7. 