How to input values into Table row constantly

I need to add values like this :

Col1 | Col2 | Col3

----------------------

A B C

D E F

G H I

Please help me how to add values into table in PowerBI

Hi NPR ,

I created a sample as your required:

Then add below M code:

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclSK1YlWcgKTzmDSBUy6gkk3MOkOJj3ApKdSbCwA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Column1 = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Column1", type text}}),
    #"Added Index" = Table.AddIndexColumn(#"Changed Type", "Index", 1, 1),
    #"Divided Column" = Table.TransformColumns(#"Added Index", {{"Index", each Number.RoundUp( _ / 3), type number}}),
    #"Added Index1" = Table.AddIndexColumn(#"Divided Column", "Index.1", 1, 1),
    #"Divided Column1" = Table.TransformColumns(#"Added Index1", {{"Index.1", each Number.Mod (_ , 3), type number}}),
    #"Pivoted Column" = Table.Pivot(Table.TransformColumnTypes(#"Divided Column1", {{"Index", type text}}, "en-US"), List.Distinct(Table.TransformColumnTypes(#"Divided Column1", {{"Index", type text}}, "en-US")[Index]), "Index", "Column1"),
    #"Removed Columns" = Table.RemoveColumns(#"Pivoted Column",{"Index.1"})
in
    #"Removed Columns"

get the result: