fname,count := vm.arglist;  // grab cammand line args

   // words may have leading or trailing "_", ie "the" and "_the"
File(fname).pump(Void,"toLower",  // read the file line by line and hash words
   RegExp("[a-z]+").pump.fp1(Dictionary().incV))  // line-->(word:count,..)
.toList().copy().sort(fcn(a,b){ b[1]<a[1] })[0,count.toInt()] // hash-->list
.pump(String,Void.Xplode,"%s,%s\n".fmt).println();