func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     long long a, b, d, i, j, k = 0, h, c, p1, p2, q1, q2, A, B, c1, c2, l, m = 0,                              n, t = 1, q = 0, r, e, x = 0, y = 0, o, s, mx1,                              mx2 = 0, mx = 0, p = 0, v, mn = 0, z, w;     string s1, s2, s3, s4;     cin >> n;     int arr[n];     for (i = 0; i < n; i++) cin >> arr[i];     sort(arr, arr + n);     x = arr[0];     t = n / 2;     i = 1;     while (t--) {       cout << arr[i] <<     << x << endl;       i++;     }   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t = 1;     cin >> t;     while (t--) solve();   }   