#include <iostream>
#include <fstream>
using namespace std;
int main() {
fstream out("aaa.txt", ios_base::app);
if (!out.good()) {
cerr << "stream buf state is bad" << endl;
return -1;
}
out << 1234567;
out << "\naaaaaaaaaddd 1222\n";
out << "end\n";
out.close();
return 0;
}