public Map<String,Integer> bag_of_words(){
		
		//System.out.println("=======================");
		
		HashMap<String,Integer> bag = new HashMap<String,Integer>();
		
		for(java.util.Map.Entry<String, String> entry : this.entrySet()){
			
			if(entry.getKey()=="Name" ||
			   entry.getKey()=="Birthday" 	
					)
				continue;

			
			for(String word : entry.getValue().split(" ")){
				//System.out.println(word);
				
				int step = 10;
				
				if(bag.containsKey(word))
					bag.put(word, bag.get(word)+step);
				else
					bag.put(word,step);
			}
		}
		
		return bag;
	}