Help with random texts

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Trying to test my GUI skills, since I haven't for a LONG time.
So I have a confirmation code that is supposed to come out random from 3 sets of letters/numbers. I have all of those as this.beg, this.mid, this.end and I set up the temp.confCode as follows

PHP Code:

temp.confCode = int(random(this.beg, 11)) @ int(random(this.mid, 9)) @ int(random(this.end, 11)); 


When I go on player and try to use it, the GUI comes up and everything's fine, but it's coming out as numbers.
One example is "035"
How can I get it to display as TEXT?

And on a side note:
How do I set text to save as a log/*.txt file from a serverside script?