#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<ll> f(int n,int m){
    if(m==2) return vector<ll>({0,(1ll<<n)-1});
    if(n==5&&m==15){
        auto w=f(2,3),ww=f(3,5);
        vector<ll> res;
        for(auto x:w)
        for(auto y:ww) res.push_back(x<<3|y);
        return res;
    }
    if(m&1){
        auto x=f(n-1,m-1);
        for(auto &y:x) y<<=1;
        x.push_back((1ll<<n)-1);
        return x;
    }
    auto x=f(n-1,m/2);
    vector<ll> res;
    for(auto y:x) res.push_back(y<<1),res.push_back(y<<1|1);
    return res;
}
int main(){
    int t;cin>>t;
    while(t--){
        int n,m;cin>>n>>m;
        auto r=f(n,m);
        for(auto x:r) cout<<x<<' ';cout<<'\n';
    }
}