Conditional Dynamic Custom Column

[Anonymous]

Hai All, I need help with this requirement on this which we want to do in the power query editor.
Background 
I work on the sales dashboard, so every month users will send a new version table with the same schema, so I use the appending option for every month to append every table.
So based on this column we can assure the different versions which appending every month(Attaching below)

And now i want create  one custom conditional  numerical column based on this 
Requriement
For 2021 verions will go like this format
V5-May-2021
V6-June-2021
V7-July-2021
V8-August-2021
V9-September-2021
V10-October-2021
V11-Novemebr-2021
V12-December-2021
based on 2021 data is ok but what about 2022 or Coming years it will be colapse
1st  requirment
So i want to create one custom numerical column that should only present numerical values
for eg. v5-may-2021 For the custom  custom should only return 5
2nd requirment 
From the next year 2022
The custom column values should show like this 122 , 222 , 322 , 422 etc(1 Is the version, 22 is the year)
From the next year 2023
The custom column values should show like this 123 , 223 , 323 , 423 etc(1 Is the version, 23 is the year)
So deired Custom column output 

Custom column
8
9
10
11
12
122
222
322
422

The top table from  8 to till 12 showing 2021 versions data and down it is showing next year(2022) desired values 
and this should be dynamically create for every version.
Note :  this i want to do in power query as a custom column 

please help me to acheieve this logic 

[lbendlin]

You should always follow ISO-8601 guidelines when naming files  or date key columns.