T = int(input()) for _ in range(T): N, X = map(int, input().split()) if N * (N + 1) // 2 > X: print(-1) continue ans = [] for i in range(N, 0, -1): ans.append(i) rem = X - sum(ans) d, m = divmod(rem, N) for i in range(N): ans[i] += d for i in range(m): ans[i] += 1 print(*ans)