Sub s()
Dim c As Range, t(1 To 4)
f = [c10].Text
For Each c In [a39:j1038]
If Len(c) = 4 Then
For i = 1 To 4
t(i) = Val(Mid(c, i, 1))
Next
For i = 1 To 3
For j = i + 1 To 4
k = (10 + t(i) - t(j)) Mod 10
If InStr(f, k) Then GoTo 100
Next
Next
c = ""
End If
100
Next
End Sub