#include <iostream>
#include <string>
using namespace std;
int main() {
auto conv = [](auto&s){s="c"+s.substr(0,s.size()-2);};
string str = "stdio.h";
conv(str);
cout << str;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3RyaW5nPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglhdXRvIGNvbnYgPSBbXShhdXRvJnMpe3M9ImMiK3Muc3Vic3RyKDAscy5zaXplKCktMik7fTsKICAgIHN0cmluZyBzdHIgPSAic3RkaW8uaCI7CiAgICBjb252KHN0cik7Cgljb3V0IDw8IHN0cjsKfQo=