docs: public void loadFromFileWithPath(String file, LabelAlphabet alphabet) throws IOException {
  		File f = new File(file);
  		FileInputStream in = new FileInputStream(f);
  		BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
  		String line;
  		while((line=reader.readLine())!=null){
  			String[] tok = line.split(" ");
  			for(int i=0;i<tok.length-1;i++){
  				addEdge(alphabet.lookupIndex(tok[i]),alphabet.lookupIndex(tok[i+1]));
  			}
  		}
  		travel();
  		
  	}