Scripting using multiple user fields

Hello,

I am struck with creating resource groups by using multiple user fields in a single script.

I would like to combine three user fields (Building section, building number and assembly code) and generate resource groups. I would also like to see the name of resource group corresponding to the user fields. Please see the desired result below

[B2]01.bouwdeel shows the building section. (Example: V)

[B2]01.bouwnummer shows the building number (Example: V04)

[B2]01.NL-sfb code shows the assembly code (21.12)

I would like to create resource groups for each assembly code corresponding to the building section and building number.


Desired result (Desired resource groups)
V_V01_Metselwerk
V_V02_Metselwerk
V_V03_Metselwerk
V_V04_Metselwerk
....
...
....
....

Please find the image attached for your reference.

I would be very happy to see a solution. Thanks in advance.

Best regards,
Sujith Mahadevan