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it's almost totally impossible to find it back here
The police will most likely inform your school if they find the wallet, unless you left some kind of contact number inside.
In which you check with your school or wait for them to contact you, since they sure have your contact number.
There is still chance of getting back the wallet, just dont hope for it to be intact.( As in some stuff could have already been taken by others)
I dun think you would get back though... although might be able to get back ic if very lucky.