Use script to randomly enter multiple data

Hi,

I'm using soapUI 3. I have to test a soap request on multiple set of data.
for 2 integers (cnum and age: see soap request below) , I use data driven to insert single data.
How do i write groovy script to use random number as an input to the 2 integers, so that I can run load test (several time) and each time have different inputs?

This is my soap request:

 

 
     
        ?
        ?
     
 


Please help ...

yarab