T = int(input())

for _ in range(T):
    N, X = map(int, input().split(" "))
    diff = X - N * (N + 1) // 2
    if diff < 0:
        print(-1)
        continue
    ans = list(reversed(list(range(1, N + 1))))
    for i in range(0, N):
        ans[i] += diff // N
    for i in range(0, diff % N):
        ans[i] += 1
    print(" ".join(list(map(str, ans))))