use std::io::Read;

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	s.trim().split('\n').skip(1).for_each(|s| {
		let n: Vec<u64> = s.split(' ').flat_map(str::parse).collect();
		if n[0] * (n[0] + 1) / 2 > n[1] {
			println!("-1");
			return;
		}
		(1..n[0]).for_each(|i| print!("{} ", i));
		println!("{}", n[1] - n[0] * (n[0] - 1) / 2);
	});
}