So thanks Azeze and Hazizul for the treat and also the time spent. Being a teacher might not make a person rich, but this is the best reward one can get for being one. And I must say, I am lucky to have many thoughtful students all these years of my teaching life.
"In teaching you cannot see the fruit of a day's work.
It is invisible and remains so, maybe for twenty years".
~ Jacques Barzun ~