#include <iostream>
#include <string>
#include <sstream>
int main()
{
std::ostringstream os(std::string(10, '*'));
os.seekp(3);
os << 1;
os.seekp(8);
os << 2;
std::cout << os.str() << '\n';
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgojaW5jbHVkZSA8c3N0cmVhbT4KaW50IG1haW4oKQp7CiAgICBzdGQ6Om9zdHJpbmdzdHJlYW0gb3Moc3RkOjpzdHJpbmcoMTAsICcqJykpOwogICAgb3Muc2Vla3AoMyk7CiAgICBvcyA8PCAxOwogICAgb3Muc2Vla3AoOCk7CiAgICBvcyA8PCAyOwogICAgc3RkOjpjb3V0IDw8IG9zLnN0cigpIDw8ICdcbic7Cn0K