Debugging a 32 kb Sofware

I got a 32 kb sofware which genrates a random number at the start and shows it to user. This sofware is asking the second number for the given first. There are several keys to open the sofware, these keys change due to terminal number and options below. Only a debugger, disassembler can solve the problem. What i want to know is; what is the mathematical relationship between this random number and the second number which i enter. The file is entered below. If you need more information just mail to me. ## Deliverables 1)Debug the sofware, and find out the relationship between 1st key and second number. ## Platform XP, 9X