Public Function prefix(chrstr As String) As String
Dim strlen As Integer
Dim counter As Integer
Dim strword As String
strlen = Len(chrstr)
counter = 1
For counter = 1 To counter <= strlen
strword = Mid(chrstr, counter, 1)
If strword <> CStr(0) Then
del_perfix = Mid(chrstr, counter, (strlen - counter))
Exit For
End If