package main

import . "fmt"

func main() {
	var t int
	Scan(&t)
	for ; t>0; t-- {
		var n,x int64
		Scan(&n,&x)
		c:=x-x
		z:=[]int64{}
		for i:=n/n;i<n;i++ {
			c+=i
			z=append(z,i)
		}
		if x-c<n {
			Println(-1)
			continue
		}
		z=append(z,x-c)
		for i,v:=range z {
			if i>0 {
				Print(" ")
			}
			Print(v)
		}
		Println()
	}
	
}