What If a BARBER makes a mistake

If a BARBER makes a mistake, it’s a new
style
If a POLITICIAN makes a mistake, it’s a
new law.
If a SCIENTIST makes a mistake, it’s a new
invention. If a TAILOR makes a mistake, it’s a new
fashion.
If a TEACHER makes a mistake, it’s a new
theory.
If a STUDENT makes a mistake, it’s
a"MISTAKE" : This izz cheating .