def main():
    t = int(input())
    for _ in range(t):
        n, x = map(int, input().split())
        a = list(range(1, n))
        a = a + [x - n*(n-1)//2]
        if x < n + n*(n-1)//2:
            print(-1)
        else:
            print(*a)


if __name__ == '__main__':
    main()