SQR: Sending and receiving numeric value to Unix script

I need to write a procedure in SQR where

Send a numeric employee id to Unix Shell script.  This Unix script will return a  number based on employee id . I need to
receive this number in SQR for further processing.

We cannot have the shell script mapping on database.

I have sent numeric/variable value to shell script and
accepted return Boolean value (yes/No) successfully. But accepting a return
number or variable in SQR is still problem.

Thanks for your help.