textdraw text aligment

Hey

I tried to make a dynamic menu like gvc's, but i stuck at the text aligment part of the system.
How is that possible, when there's a ' , ' in the string, the string after the comma will jump to the right side of the textdraw.

You can see the list there
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This is the menu
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And this is my version of the dynamic menu
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So.. what is the easiest way to make this?