Bit of #guitar help, Fediverse?

I have this weird thing which calls itself a "Guitarlele". It's a very-short-string nylon string acoustic which is like a regular guitar with a capo on the 5th fret, i.e. to play an E shape down at the nut is to play an A chord.

My question is, what strings can I put on it, because they desperately need replacing as you can probably see.