Clear cells that do not contain specific text which may be at the beginning or end of cell

Hello, I am a VBA novice and have the following problem:

I have a range of cells, each cell containing two sets of staff initials, for eg, JL SW or BN JL

I want to clear the cells that do not contain one of the sets of initials. I have the following code that works fine if there is just JL in the cell so can anyone help amend it to do the same thing but if JL is part of the cell content? Like a wild card? Many thanks.

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I have just found answer as below so thank you and any criticism of my coding would be welcomed.

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Just my 2 cents worth.
You can change this

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to this

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It is a relatively small range so the looping does not affect the speed all that much.
Both looping and selecting are to be avoided as much as possible.

Thank you very much - I really appreciate your feedback and will take you comments on board. Best wishes Siân