def main():
    T = int(input())
    N_sum = 0
    assert 1 <= T <= 10**5
    for _ in [0]*T:
        N,X = map(int,input().split())
        assert 1 <= N <= 2*10**5
        assert 1 <= X <= 10**18
        N_sum += N
        amari = X - N*(N+1)//2
        if amari < 0:
            print(-1)
            continue
        ans = list(range(1,N+1))
        ans[-1] += amari
        print(*ans)
    assert N_sum <= 2*10**5
    
if __name__ == "__main__":
    main()