func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       int a[n], b[n];       for (int i = 0; i < n; i++) cin >> a[i];       for (int i = 0; i < n; i++) cin >> b[i];       sort(a, a + n);       sort(b, b + n);       for (int i = 0; i < n; i++) cout << a[i] <<    ;       cout << endl;       for (int i = 0; i < n; i++) cout << b[i] <<    ;       cout << endl;     }   }   