#include<bits/stdc++.h>
using namespace std;

#define Alhamdulillah ios_base::sync_with_stdio(0), cin.tie(0);
#define ll long long
#define ull unsigned long long
#define endl '\n'
#define db(i) cout << "db -> " << i << endl;
#define pv(v) for(auto e : v)   cout << e << " ";   cout << endl;
#define pm(m) for(auto [x,y] : m)   cout << x << " " << y << endl;   cout << endl;


int tg;

void even(int n);
void odd(int n);

void solve(){
    cin >> tg;
    if(tg == 1) cout << 1;
    else if(tg == 2)    cout << 2 << " " << 1;
    else if(tg == 3)    cout << 2 << " " << 3 << " " <<  1;
    else    odd(1);
    cout << endl;
}

int main(){
    Alhamdulillah
    int t=1;    cin >> t;
    while(t--)  solve();
    return 0;
}

void even(int n){
    if(n > tg)  return;
    cout << n-1 << " ";
    odd(++n);
}
void odd(int n){
    if(n > tg)  return;
    cout << n+1 << " ";
    even(++n);
}