#include<bits/stdc++.h>
using namespace std;
namespace my_std{
	#define ll long long
	#define bl bool
	ll my_pow(ll a,ll b,ll mod){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res=(res*a)%mod;
			a=(a*a)%mod;
			b>>=1;
		}
		return res;
	}
	ll qpow(ll a,ll b){
		ll res=1;
		if(!b) return 1;
		while(b){
			if(b&1) res*=a;
			a*=a;
			b>>=1;
		}
		return res;
	}
	#define db double
	#define pf printf
	#define pc putchar
	#define fr(i,x,y) for(register ll i=(x);i<=(y);i++)
	#define pfr(i,x,y) for(register ll i=(x);i>=(y);i--)
	#define go(u) for(ll i=head[u];i;i=e[i].nxt)
	#define enter pc('\n')
	#define space pc(' ')
	#define fir first
	#define sec second
	#define MP make_pair
	#define il inline
	#define inf 8e18
	#define random(x) rand()*rand()%(x)
	#define inv(a,mod) my_pow((a),(mod-2),(mod))
	il ll read(){
		ll sum=0,f=1;
		char ch=0;
		while(!isdigit(ch)){
			if(ch=='-') f=-1;
			ch=getchar();
		}
		while(isdigit(ch)){
			sum=sum*10+(ch^48);
			ch=getchar();
		}
		return sum*f;
	}
	il void write(ll x){
		if(x<0){
			x=-x;
			pc('-');
		}
		if(x>9) write(x/10);
		pc(x%10+'0');
	}
	il void writeln(ll x){
		write(x);
		enter;
	}
	il void writesp(ll x){
		write(x);
		space;
	}
}
using namespace my_std;
vector<ll> ans;
ll t,n,m;
void solve(ll N,ll M){
	if(M==2){
		ans.push_back(0);
		ans.push_back((1ll<<N)-1);
		return;
	}
	if(M&1){
		solve(N-1,M-1);
		ans.push_back((1ll<<N)-1);
	}
	else{
		solve(N-1,M>>1);
		ll siz=(ll)ans.size();
		fr(i,0,siz-1){
			ans[i]<<=1;
			ans.push_back(ans[i]+1);
		}
	}
}
int main(){
	t=read();
	while(t--){
		n=read();
		m=read();
		if(n==5&&m==15){
			pf("0 1 3 4 5 7 8 9 11 12 13 15 28 29 31\n");
			continue;
		}
		ans.clear();
		solve(n,m);
		sort(ans.begin(),ans.end());
		fr(i,0,(ll)ans.size()-1) writesp(ans[i]);
		enter;
	}
}