#![allow(non_snake_case, unused_imports)]
use proconio::{fastout, input, marker::*};

#[fastout]
fn main() {
    input! {
        T: usize,
    }

    for _ in 0..T {
        input! {
            N: usize, X: usize,
        }

        if N * (N + 1) / 2 > X {
            println!("-1");
        } else {
            let rem = X - N * (N + 1) / 2;

            let mut ans = (1..=N).map(|i| i + rem / N).collect::<Vec<_>>();
            ans.reverse();

            let r = rem % N;

            for i in 0..r {
                ans[i] += 1;
            }

            println!(
                "{}",
                ans.iter()
                    .map(|x| x.to_string())
                    .collect::<Vec<_>>()
                    .join(" ")
            );
        }
    }
}