This is some text.

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ll long long
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t;
    cin >> t;
    while (t--)
    {
        int n;
        cin >> n;
        cout << 1 << " ";
        for (int i = 2; i <= n - 1; ++i)
        {
            cout << (i ^ 1) << " ";
        }
        if ((n - 1) % 2 == 0)
        {
            cout << n - 1 << " ";
        }
        else
        {
            cout << n << " ";
        }

        cout << endl;
    }
    return 0;
}

The rest of the text. I don't know why I can pass just by swapping the first and last numbers in the output.