#include <iostream>
#include <functional>
using namespace std;
int main() {
function<string()> blah = [](){return "123";};
cout << blah();
// your code goes here
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8ZnVuY3Rpb25hbD4KdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkgewoJZnVuY3Rpb248c3RyaW5nKCk+IGJsYWggPSBbXSgpe3JldHVybiAiMTIzIjt9OwoJCgljb3V0IDw8IGJsYWgoKTsKCQoJLy8geW91ciBjb2RlIGdvZXMgaGVyZQoJcmV0dXJuIDA7Cn0=