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