T = int(input())

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