ans = []
t = int(input())
for _ in range(t):
    n, x = map(int, input().split())
    l = []
    ss = 0
    bef = 10**18 + 1
    for i in range(n, 0, -1):
        left = i - 1
        right = bef
        while right - left > 1:
            mid = (left + right) // 2
            s = mid * (mid + 1) // 2
            if s >= x - ss:
                right = mid
            else:
                left = mid
        l.append(right)
        ss += right
        bef = right
    l = l if sum(l) == x else [-1]
    ans.append(l)
for an in ans:
    print(*an)