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)