#include <iostream>
#include <regex>
using namespace std;
 
int main() {
    std::string str = "\"Hello people \" how are you doing \" what are \" you upto \"";
    str = std::regex_replace(str, std::regex("(?!^)\"(?!$)"), """);
    std::cout << str << std::endl;
	return 0;
}
				I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8cmVnZXg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpIHsKICAgIHN0ZDo6c3RyaW5nIHN0ciA9ICJcIkhlbGxvIHBlb3BsZSBcIiBob3cgYXJlIHlvdSBkb2luZyBcIiB3aGF0IGFyZSBcIiB5b3UgdXB0byBcIiI7CiAgICBzdHIgPSBzdGQ6OnJlZ2V4X3JlcGxhY2Uoc3RyLCBzdGQ6OnJlZ2V4KCIoPyFeKVwiKD8hJCkiKSwgIiZxdW90OyIpOwogICAgc3RkOjpjb3V0IDw8IHN0ciA8PCBzdGQ6OmVuZGw7CglyZXR1cm4gMDsKfQ==