Need Alpha-Numeric string

Need to get a random alpha numeric string created. I can only get a numeric string. Let me know if there are any suggestions.

I would do something like:

repeat 10 times
     put any item of (A..Z &&& 0..9) after randString
end repeat

log RandString

This creates a list of all characters A to Z and all numbers 0 to 9 and then gives you a random item from that list.