Count consecutive letters in columns

Hi All!
I´m new with excel and I would know if someone could help me with this I would appreciate so much!:
If I had a column in cells for example
v
x
x
v
v
x
x
x
v
v
v
x


I found the way to count couple "vv" or "xx" counting the "vvv" and doing 3-1 or "vvvv" = 4-1= 3 couples presence.

Now how should I do to find "xv" and "vx" numbers of couples present in that column that is very long 1000 cells for example?

Thank You !

Gitano

Ok,
to find the "vvv" for example I used this where I put the goal number for example 3 and after I do 3-1 to find my number " 2 couples"
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Function Contig(ByRef Myaddr As Range, ByVal myVal As String, ByVal myGoal As Integer) As Integer
For Each cell In Myaddr
If cell.Value = myVal Then
ccnt = ccnt + 1
Else
If ccnt = myGoal Then Contig = Contig + 1
ccnt = 0
End If
Next cell
End Function

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How I can modify this to find xv or vx ? Or there is a function or another macro?
Thank a Lot !
Gitano