public void getString(String[] str, String temp, int start, int sub_start) {
		 if (start == str.length) {
		 result.add(temp);
		 return;
		 }
		for (int i = sub_start; i < str[start].length(); i++) {
			String new_temp = temp;
			new_temp += (str[start].charAt(i) + "");
		
			getString(str, new_temp, start+1, 0);
			
		}
	}