Code:
Sub M_snb()
   sn = [B3:B12]
   
   For j = 1 To UBound(sn)
     sn(j, 1) = Replace(Replace(StrConv(Replace(Replace(sn(j, 1), ".", ". "), "/", "/ "), 3), ". ", "."), "/ ", "/")
     
     st = Split(sn(j, 1))
     For jj = 0 To UBound(st)
         If st(jj) Like "*[0-9]*" Then st(jj) = UCase(st(jj))
     Next
     sn(j, 1) = Join(st)
     
     For Each it In Split("di da con per mm in a e la le")
       If InStr(1, sn(j, 1) & " ", " " & it & " ", 1) Then sn(j, 1) = Trim(Replace(Replace(sn(j, 1) & " ", " " & UCase(it) & " ", " " & it & " "), " " & StrConv(it, 3) & " ", " " & it & " "))
     Next
   Next
   
   [G3:G12] = sn
End Sub