Some laptop keys stopped working.

I woke up today and my y, u , i, o, p, h, j, k, n, and m keys are not working on my laptop. Nothing happened to the computer last night as far as I'm aware. What can I do? What might this be?

I'm super-broke, so I'm hoping I don't have to take it for some expensive repair. That would have to wait awhile.

The laptop is a Dell Latitude E6410.

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