T = int(input())
L = []
for i in range(T):
  L.append(list(map(int, input().split(' '))))

for N,X in L:
  cnt = 1
  lst = []
  while True:
    
    if X >= cnt:
      if len(lst) == N-1:
        lst.append(X)
        print(' '.join([str(i) for i in lst]))
        break
      lst.append(cnt)
      X -= cnt
      cnt += 1
    else:
      print('-1')
      break