Skipping values in a matrix using Index

I attempted to attach a spreadsheet, but it wouldn't work.
The best I can do is provide the screen shot below.

Example image.jpg

This is a difficult problem to explain using only words, but I will do my best.
I have Column Q which shows a material, and then Columns R-AB showing the sizes that the material is available in.
There are some blank values in Columns R-AB because not all materials are available in all sizes.
That leaves me with a data set that looks something like this:

T1001 21 22
T1002 22 24 25
T1003 30

I want to convert this data so that everything is listed in two columns vertically in AD and AE, like below:

T1001 21
T1001 22
T1002 22
T1002 24
T1002 25
T1003 30

I'm trying to use INDEX, but I'm hitting a wall. Any ideas?

Administrative note

Welcome to the forum

in your haste to solve your problem, you probably missed the yellow banner advising how to get answers faster by posting a sheet ?

Please take a moment to read it and attach a sheet accordingly.

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