const N=5;
var rows=(0).pump(N,List, (0).pump.fp(N,List,(1).random.fpM("1-",21)) );
try{
   foreach r in (N){
      foreach c in (N){
         x:=rows[r][c]; x.print(",");
         if (x==20) { println("Found it!"); throw(Exception.Generic); }
      }
   }
   println("Not found");
}catch(Generic){}