T = int(input())
for _ in range(T):
    N, X = map(int, input().split())
    S = (N+1)*N//2
    if S > X:
        print(-1)
        continue
    ans = list(range(N, 0, -1))
    R = (X - S) // N
    if R > 0:
        for i in range(N):
            ans[i] += R
    for i in range((X - S) % N):
        ans[i] += 1
    print(*ans)