program ideone;
uses classes;
function mycomp(item1: Pointer; item2: Pointer) : longint;
begin
	mycomp := int64(item1^)-int64(item2^);
end;
 
var
	t,n,c,i,x: int64;
	list: array of int64;
	ss: TList;
	p: pointer;
begin
	read(t);
	while t > 0 do
	begin
		t -= 1;
 
		read(n,c);
		setlength(list,n);
		ss := Tlist.create;
		for i := low(list) to high(list) do
		begin
			read(x);
			list[i] := x;
			ss.add(@list[i]);
		end;
		ss.sort(@mycomp);
		for p in ss do
		begin
			writeln(int64(p^));
		end;
	end;
end.

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