Option Explicit
Sub abc()
Dim a, i, j, k, kk, m
a = Range("b2:b" & [b2].End(xlDown).Row).Value
ReDim b(1 To 10 ^ 4, 1 To 1) As String
For i = 1 To UBound(a)
a(i, 1) = a(i, 1) & "?"
For j = 1 To Len(a(i, 1))
If IsNumeric(Mid(a(i, 1), j, 1)) Then
For k = j + 1 To Len(a(i, 1))
If Not IsNumeric(Mid(a(i, 1), k, 1)) Then
If (k - j) Mod 14 = 0 Then
For kk = j To k - 1 Step 14
m = m + 1
b(m, 1) = Mid(a(i, 1), kk, 14)
Next
End If
j = k: Exit For
End If
Next
End If
Next
Next
If m > 0 Then [a2].Resize(m) = b
End Sub