T = int(input())
for i in range(T):
  N, X = map(int, input().split(' '))
  lst = []
  for j in range(1, N):
    if X < j:
      lst = [-1]
      break
    
    lst.append(j)
    X -= j
  
  if X <= j:
    lst = [-1]
  else:
    lst.append(X)
  
  print(' '.join([str(j) for j in lst]))