Determine the level of educational achievements for the pupil (elementary, average, sufficient, high) according to the given grade (from 1 to 12).
One number that is a grade for the pupil.
Print "Initial" for elementary level (grade from 1 to 3), "Average" for average level (grade from 4 to 6), "Sufficient" for sufficient level (grade from 7 to 9) and "High" for high level (grade from 10 to 12).