fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)

fun readLargeInt () =
    valOf (TextIO.scanStream (LargeInt.scan StringCvt.DEC) TextIO.stdIn)


fun printList [] = print "\n"
  | printList [x] =
    (
      print (LargeInt.toString x);
      printList []
    )
  | printList (h :: tl) = 
    (
      print (LargeInt.toString h);
      print " ";
      printList tl
    )


fun printAns [] = ignore ()
  | printAns (h :: tl) = 
    (
      printList h;
      printAns tl
    )


val () =
    let
        val t = readInt ()
        val cases = List.tabulate (t, fn _ =>
                                         let
                                             val d = readInt()
                                             val a = readLargeInt()
                                             val x_s = List.tabulate (d, fn _ => readLargeInt())
                                         in
                                             (d, a, x_s)
                                         end
                                  )

        val ans = List.map (fn (d, a, x_s) =>
                               List.map (fn x =>
                                            Real.toLargeInt IEEEReal.TO_NEAREST ((Real.fromLargeInt x) / (Real.fromLargeInt a)))
                                        x_s)
                           cases
    in
        printAns ans
    end