concatenate/append Columns with Different Column Names in same table

[Mojtaba]

I have many columns of same table 

Table A

Monthly Plan  Weekly plan   Actual  Monthly Plan1  Weekly plan 2  Actual3

A                                 B              C                    D               E                F

I wanted them as :

Monthly Plan  Weekly plan   Actual 

 A                                 B                 C  

D                                 E                   F

I can not create a sperate table and append it because there are so many columns and i cant create too many tables.

[wdx223_Daniel · Accepted solution]

NewStep=#table(List.FirstN(Table.ColumnNames(PreviousStepName),3),List.TransformMany(Table.ToRows(PreviousStepName),each List.Split(_,3),(x,y)=>y))

[Mojtaba]

Thanks ,I am not sure If I can understand this code properly,can you please explain a bit more