In a code language, if 'my personal use' is written as '521', 'use these things’ is written as '169', ‘personal things' is written as '29', then which phrase would the code ‘569’ represent in this language?

my these things

Given; In a code language, if 'my personal use' is written as '521', 'use these things’ is written as '169', ‘personal things' is written as '29'

So,

MY PERSONAL USE  =  5 2 1

USE THESE THINGS  =  1 6 9

PERSONAL THINGS  =  2 9

So, Code for MY is 5, THESES is 6 

Thus, code 569 stands for MY THESE THINGS