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.
Example: 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
Example solution: After step 3.
Example explanation: 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.'

Problem: Steps: (1) In this stage the chromosomes become visible and the centrioles separate and move to opposite poles of the cell (2) In prophase the chromosomes become visible and the centrioles separate and move to opposite poles of the cell (3) In metaphase the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere (4) In anaphase the sister chromatids separate into individual chromosomes and are pulled apart (5) During telophase the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes (6) Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.
Where does the following step fit into the given list of steps: Prophase is the first and longest stage of mitosis
Solution: Before step 1.