t = int(input()) for _ in range(t): n, x = map(int, input().split()) mi = (n + 1) * n // 2 if mi > x: print(-1) continue ave = (x - mi) // n rem = (x - mi) % n ans = list(range(n + ave, ave, -1)) for i in range(rem): ans[i] += 1 print(*ans)