TASK DEFINITION: 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.
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. 

PROBLEM: Steps: (1) The oil is transported to stores (2) Oil is purchased by homeowners (3) Oil is placed into a stove in the house (4) The oil is lit on fire, and burns for a long time (5) The warm air off of the oil travels through the house  
Where does the following step fit into the given list of steps: Oil is gathered through mining operations 

SOLUTION:  Before step 1. 

PROBLEM: Steps: (1) Adult mushrooms produce spores (2) Release them into the air by process of sporulation (3) Spores are carried by the wind (4) Land in a hospitable growing environment (5) The mushroom starts growing (6) The adult mushroom produce spores of its own to repeat the process.  
Where does the following step fit into the given list of steps: The spores germinate into the soil 

SOLUTION:
 After step 4.