import sys


def printe(*args, end="\n"):
    print(*args, end=end, file=sys.stderr)


def main():
    T = int(input())
    for _ in range(T):
        N, X = map(int, input().split())
        if (N + 1) * N // 2 > X:
            print(-1)
            continue
        if N == 1:
            print(X)
            continue
        if (N + 1) * N // 2 == X:
            print(*range(N, 0, -1))
            continue
        partial_sum = N * (N - 1) // 2
        results = []
        results.append(X - partial_sum)
        results.extend(range(N - 1, 0, -1))

        loop = (results[0] - results[1] - 1) // N
        rest = (results[0] - results[1] - 1) % N

        results[0] -= loop * (N - 1)
        for idx in range(1, N):
            results[idx] += loop

        if rest >= 2:
            rest -= 1
            for idx in range(1, N):
                results[0] -= 1
                results[idx] += 1
                rest -= 1
                if rest == 0:
                    break
        print(*results)


if __name__ == "__main__":
    main()