for _ in range(int(input())):
    n, x = map(int, input().split())
    if (1 + n) * n // 2 > x:
        print(-1)
    else:
        v = x - (1 + n) * n // 2
        k = v // n
        r = v % n
        ans = [0] * n
        for i in range(n):
            ans[i] = n - i + k + (i < r)
        print(*ans)