private String calc(String input) {
	  String output = "";
	  int length = input.length();
	  Integer[] tempArray = new Integer[length];
	  for(int i = 0; i < length; i++){
	  	tempArray[i] = i;
	  }
	  Collections.shuffle(Arrays.asList(tempArray));
	  for(int x = 0; x < length; x++){
	  	output += input.charAt(tempArray[x]);
	  }
	  return output;
	}