[Solved] Excel Order Form: Check Item Availability with Customer's Week Selection

Hello.
Maybe excel is not my strongest side, but I'm doing a bit.
I have a problem to solve with the customer order form.
The list of goods contains several hundred items.
For each item, one of the cells has a list of weeks of the year in which the item is available. For example - 1 2 7 10 15. Weeks are expressed digitally. As one or two digital characters ranging from 1 to 52, and numbers separated by spaces.
From the drop-down list, the customer selects the week number for which he places the order.
I wanted to make the appropriate cell appear with each item that does not match the aforementioned availability list, the signature "not available" or "available".
I am asking for ideas about the method of implementation.

If you can't put these week numbers in separate columns, start practicing visual basic for application. If you can have these numbers in separate columns (instead of spaces), you will leave it with formulas - the rest is a matter of googling

For example, with the formula as in the appendix.

Edit: formula correction

Thank you adamas_nt.
I'm not that far in Excel. Your idea does the trick!
I close