Search and copy the corresponding value from duplicate values into the adjacent cell

Hello
I need your help please in the attached sample file ( original file with data over 100,000 rows)
Column A has many duplicate values and in column S the value is corresponding to this value but its enter only in one cell.
What I want is to copy the value mentioned in column S in front of all corresponding value in column A.
 I hope this clear
LIST-1.xlsx
M. SaadAsked:
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aikimarkCommented:
attached sample file
File missing
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M. SaadAuthor Commented:
sorry, i have attached the sample
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aikimarkCommented:
copy the value mentioned in column S in front of all corresponding
Prepend the S column value to the text in the A column values?
Example:
SMGFB-JS-PM-T-00102A00-GA-E-0060012
SMGFB-JS-PM-T-00102A00-GA-E-0060012
SMGFB-JS-PM-T-00102A00-GA-E-0060012
SMGFB-JS-PM-T-00102A00-GA-E-0060012

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Or create a new column A with the column S values?
Example:
New Column A       	Col.1
SMGFB-JS-PM-T-00102	A00-GA-E-0060012
SMGFB-JS-PM-T-00102	A00-GA-E-0060012
SMGFB-JS-PM-T-00102	A00-GA-E-0060012
SMGFB-JS-PM-T-00102	A00-GA-E-0060012

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or something else?

======================
corresponding
These two columns don't seem to share any common data.  Are they 'related' by the color coding?

What should happen when there is NO column S data?  An example of this condition is in rows 53-60.
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M. SaadAuthor Commented:
thanks for your concern, please note that

1- color has nothing to do with the data
2- " What should happen when there is NO column S data?  An example of this condition is in rows 53-60." ... nothing should be in the column S.
3 - example for document no from column A " A00-GA-E-0060012" this number start from rows 21-29 but the number "SMGFB-JS-PM-T-00102" is available on row no 26 only.
so i want the code or formula to search for all duplicate no in column A and then search for the value available in column S and then copy this value in the other empty cells in same column S ( so the result will be SMGFB-JS-PM-T-00102 available in all rows from 21-29.)

as you can see in the attached photo , the number highlighted in red is the original input, and the black numbers is what i need to do automatically
Capture.PNG
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Subodh Tiwari (Neeraj)Excel & VBA ExpertCommented:
Please give this a try...
Sub PopulateColumnS()
Dim ws As Worksheet
Dim lr As Long, i As Long
Dim x, y(), dict

Application.ScreenUpdating = False

Set ws = Sheets("Sheet1")
lr = ws.Cells(Rows.Count, 1).End(xlUp).Row
x = ws.Range("A21:S" & lr).Value
ReDim y(1 To UBound(x, 1), 1 To 1)
Set dict = CreateObject("Scripting.Dictionary")
For i = 1 To UBound(x, 1)
    If x(i, 19) <> "" Then dict.Item(x(i, 1)) = x(i, 19)
Next i
On Error Resume Next
For i = 1 To UBound(x, 1)
    y(i, 1) = dict.Item(x(i, 1))
Next i
ws.Range("S21").Resize(UBound(y), 1).Value = y
Application.ScreenUpdating = True
End Sub

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In the attached, click the button called "Populate Column S" on Sheet1 to run the code.
LIST-1.xlsm
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M. SaadAuthor Commented:
dear Mr. Neeraj
many thanks for your support
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Subodh Tiwari (Neeraj)Excel & VBA ExpertCommented:
You're welcome!
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aikimarkCommented:
Posting an example of what you needed was very helpful.  It would have saved time and clarification questions.

Kudos to Neeraj for an efficient solution.
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Subodh Tiwari (Neeraj)Excel & VBA ExpertCommented:
Thanks aikimark!
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