public static int findMaxNote(String song){
		String s = copyOfString(song),temp = s;
		int max = 0;
		while(!s.equals("")){
			if(s.indexOf('?') != -1)
				s = s.substring(s.indexOf('?')+1);
			else
				break;
			if(s.length()>=3)
				temp = s.substring(0,3);
			else
				temp = s;
			if(temp.contains("@") || temp.contains("$") || temp.contains("?")){
				temp = temp.substring(0,2);
			}
			if(Integer.parseInt(temp)> max)
				max = Integer.parseInt(temp);
		}
		return max;
	}