code: final protected static void doMain(StringDistance d,String[] argv) 
  	{
  		if (argv.length!=2) {
  		    System.out.println("usage: string1 string2");
  		} else {
  		    System.out.println(d.explainScore(argv[0],argv[1]));
  		}
  	}
docs: Default main routine for testing