package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	wr:=bf.NewWriter(Stdout)
	defer wr.Flush()
	var t int
	Fscan(rd,&t)
	ans := make([]any, 0, 2e5)
	for ; t > 0; t-- {
		var n, x int
		Fscan(rd,&n,&x)
		if n*(n+1)/2 > x {
			Fprintln(wr, -1)
			continue
		}
		r := x - n*(n+1)/2
		ans = ans[:n]
		for i := range ans {
			v := n-i + r/n
			if r%n > 0 {
				v++
				r--
			}
			ans[i] = v
		}
		Fprintln(wr, ans...)
	}
}