import java.util.*;
import java.io.*;
class Main{
	private static final BufferedReader br =
		new BufferedReader(new InputStreamReader(System.in));
	private static final PrintWriter out =
		new PrintWriter(System.out);
	public static void main(String[] args)throws IOException{

		int T = Integer.parseInt(br.readLine());
		while(T-->0){
			String[] str = br.readLine().split(" ");
			long N = Long.parseLong(str[0]);
			long X = Long.parseLong(str[1]);
			if(X<N*(N+1)/2)
				out.println(-1);
			else{
				long sub = X-N*(N+1)/2;
				long index = sub%N;
				out.print(N+sub/N+(0<index?1:0));
				for(int i=1;i<N;i++){
					out.print(" ");
					out.print((N-i)+sub/N+(i<index?1:0));
				}
				out.println();
			}
		}

		br.close();
		out.close();
	}
}