Code:
on 1:INPUT:*:{
  if (/ != $left($1-,1) {
    if (%happy isin $1-) { 
     msg $active $replace($1-, %happy, %happyc) | halt 
    }
   }  
}

my take.

"Illegitimati non Carborundum" -> "Don't let the bastards grind you down."