Run Code On Worksheets With Certain Tab Names

My Thread title should have read covert code TO run on all worksheets with same word in Name. I have had a look at some other pieces of code in this forum but they are quite the same as I want to do....I have tried a few things but each time I get an error ...so for sure I am not modifying the code quite right, I ahve been missing something for what I now want it to do. So I wonder if someone could Please review these two pieces of code...they of course are both for running on just one worksheet in a wookbook.

I would like them both be able to run, still as tow separete pieces of code as they are, on all and only worksheets that have in their worksheet name a key word in this case the word "Region" and that those worksheets all in a single workbook but the workbook does have other worksheets in it I dont want the code to run one on - but those worksheets do not have in their worksheet name the word "Region".

Sub test()
Dim r As Range, txt As String, ws1 As Worksheet, i As Long
Set ws1 = Sheets(1)
With CreateObject("Scripting.Dictionary")
.CompareMode = vbTextCompare
For i = 16 To 21
Again:
For Each r In ws1.Range(ws1.Cells(6, i), ws1.Cells(Rows.Count, i).End(xlUp))
If r.Value <> "" Then
If Not .exists(r.Value) Then
.Add r.Value, Nothing
Else
txt = txt & "," & r.Address(0, 0)
If Len(txt) > 245 Then
ws1.Range(Mid$(txt, 2)).EntireRow.Delete
txt = "": .RemoveAll: Goto Again
End If .............