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