Added list of students
Added hardcoded student count
Added some comments to explain what's going on
Added student_count variable and refactored how the  count is displayed
Put the students in to an array and loop over it to print out the names. Removed hardcoded count and just use the length of the array to get the number.
Refactored code to use methods
Changed students array to a hash and used symbols for the cohort month
Stretch exercises for student directory - Only print if starts with letter a and only print if name is less than 12 chars
Stretch task - centre the student list when printing it
Stretch task - Change to singular or plural based on how many students
Stretch task - asks user for the cohort as well as name. If no name is entered it skips the cohort question and quits