T = int(input())
for i in range(T):
  N, X = map(int, input().split())
  left = 1
  right = X

  while left + 1 < right:
    mid = (left + right) // 2
    if mid * (mid + 1) // 2 >= X:
      right = mid
    else:
      left = mid + 1
  if left < N or (left == N and left * (left + 1) // 2 > X):
    print(-1)
  else:
    d = 0
    for i in range(N - 1):
      print(left - d, end = " ")
      d += 1
    print(X - (N - 1) * left + d * (d - 1) // 2)