Scanf.scanf "%d" (fun n ->
    for i = 1 to n do
        Scanf.scanf " %d" (fun k ->
            let arr = Array.init k (fun _ -> Scanf.scanf " %d" (fun l -> -l)) in
            Array.sort compare arr;
            Array.iter (fun v -> Printf.printf "%d " (-v)) arr
        );
        print_newline ()
    done
)