fcn encode(text,table){ text.pump(String,table.get) }
fcn decode(bits,table){  // this is a horrible decoder, for testing only
   w:=bits.walker(); sink:=Sink(String);
   try{ s:=""; while(1){
      s+=w.next(); if(c:=table.find(s)) { sink.write(c); s=""; }
   }}catch(TheEnd){}
   sink.close();
}