hh -> HH

// hh to HH

#include <iostream>
#include <string>

std::string PM(std::string);
std::string AM(std::string);

int main() {
    std::string hhTime, HHtime;
    getline(std::cin, hhTime);

    if (hhTime[8] == 'P')
        HHtime = PM(hhTime.substr(0, 8));
    else HHtime = AM(hhTime.substr(0, 8));

    std::cout << HHtime << std::endl;
    return 0;
}

std::string PM(std::string hhTime) {
    std::string shour = hhTime.substr(0, 2);
    if (shour != "12") {
        int ihour = std::stoi(shour) + 12;
        hhTime.replace(0, 2, std::to_string(ihour));
    }
    return hhTime;
}

std::string AM(std::string hhTime) {
    std::string shour = hhTime.substr(0, 2);
    if (shour == "12") {
        hhTime.replace(0, 2, "00");
    }
    return hhTime;
}