#include<iostream>
#include<cstdio>
#include<vector>
#include<cstring>
#include<queue>
#define int long long
#define abs(a) max(a,-(a))
using namespace std;
int T,n,m;
int P(int l,int r)
{
	int ret=0;
	for(int i=l;i<=r;i++)
	{
		ret|=(1ll<<i);
	}
	return ret;
}
signed main()
{
	scanf("%lld",&T);
	while(T--)
	{
		scanf("%lld%lld",&n,&m);
		m-=2;
		cout<<0<<" "<<(1ll<<n)-1<<' ';
		if(m==0) continue;
		for(int i=1;i<=n;i++)
		{
			for(int z=0;z<=i;z++)
			{
				if(i==n-1&&z==0) continue;
				cout<<P(z,i)<<' ';
				m--;
				if(m==0) break;
			}
			if(m==0) break;
		}
		cout<<endl;
	}
}