Suzuki Splash 2012 1.2 PIN Code

Hallo

I have a small request if possible.
I want to code a new key to a Suzuki Splash 1.2 Gasoline year 2012.
I've tried coding the Key as Agila B (same platform) with Texa but no luck.
The key will not memorize.
I think need new 20 digit to 4 digit pin code ,because entering
as Suzuki system1 in the X100 pro the result is a 20digit code:
F9E8 1CEF 50D1 1CF5 0A88
Someone is able to calculate 4 digit pin code so I can try to learn the key?
Posted same request in D K forum but no luck.
Here Suzuki service can't help me.
Many thanks in advance.

Cheers