Conditional Formatting in word vba - vba

Question

Greeting to all Members and Experts, I am trying to automate
the formatting process in word. The formatting is done by applying styles. But before applying styles I need to trim extra spaces between characters of serial numbers, for example, 1. a. i. and insert tabs after dot(.) and then apply the style. I have attached a sample document. Plz have a look. I have tried to get the desired result by using the following code but it doesn't get the work done
I am new here so i dont know how to attach sample files so, here is the link for sample file. https://docs.google.com/document/d/1Z1dB6tvPKVrxHlw7qV8VNyiy49c5lRZN/edit?usp=sharing&ouid=101706223056224820285&rtpof=true&sd=true
Any help or suggestion would be of great help. Thanks in advance...
Sub formatts()
Dim a As Integer
Dim i As Integer, n As Long, para As Paragraph, rng As Range, doc As Document
Set doc = ActiveDocument
With doc
For i = 1 To .Range.Paragraphs.Count
For n = 1 To doc.Paragraphs(i).Range.Characters.Count
If .Paragraphs(i).Range.Characters(n).Text = " " Or .Paragraphs(i).Range.Characters(n).Text = Chr(9) Or .Paragraphs(i).Range.Characters(n).Text = Chr(160) Then
.Paragraphs(i).Range.Characters(n).Select
'This line checks whether the first character is whitespace character or not and delete it.
doc.Paragraphs(i).Range.Characters(n).Delete
ElseIf .Paragraphs(i).Range.Characters(n).Text = "." Then
.Paragraphs(i).Range.Characters(n).InsertAfter (vbTab)
n = n + 1
a = a + 1
ElseIf .Paragraphs(i).Range.Characters(n).Text Like "[a-z]." And .Paragraphs(i).Range.Characters(n).Next.Next.Text <> "i" Then
Exit For
End If
If a >= 3 Then Exit For
Next
For n = 1 To doc.Paragraphs(i).Range.Characters.Count
If .Paragraphs(i).Range.Characters(n).Text = "i" And .Paragraphs(i).Range.Characters(n).Next.Text = "." And .Paragraphs(i).Range.Characters(n).Next.Next.Text = " " Then
doc.Range.Paragraphs(i).Style = "shh"
Exit For:
ElseIf .Paragraphs(i).Range.Characters(n).Text = "a" Or .Paragraphs(i).Range.Characters(n).Text = "b" Or .Paragraphs(i).Range.Characters(n).Text = "c" And .Paragraphs(i).Range.Characters(n).Next.Text = "." And .Paragraphs(i).Range.Characters(n).Next.Next.Text = " " Then
doc.Range.Paragraphs(i).Style = "sh"
Exit For
End If
Next
Next
End With
End Sub