#include <iostream>
#include <vector>
#include <string>
#define YEAR 6
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))

bool isPolindrome(std::string str) {
    return str == std::string(str.rbegin(), str.rend());
}


std::string createOutputPolindromes(std::string date) {
    return date.substr(0, 2) + "." + date.substr(2, 2) + "." + date.substr(4);
}

std::string createDate(const std::string& year, const std::string& month, const std::string& day) {
    return day + month + year;
}


std::vector<std::string> datePolindrom(std::string dateStart, std::string dateEnd) {
    std::vector<std::string> Polindromes;


    int currentYear = std::stoi(dateStart.substr(YEAR)) - 1;
    int lastYear = std::stoi(dateEnd.substr(YEAR));

    while (++currentYear < lastYear) {
        std::string currentStringYear = std::to_string(currentYear);
        std::string currentStringOriginalYear = currentStringYear;
        std::reverse(currentStringYear.begin(), currentStringYear.end());
        std::string LastFourNumsInTheYear = currentStringYear.substr(currentStringYear.length() - 4);
        std::string stringDay = LastFourNumsInTheYear.substr(0, 2);
        std::string stringMonth = LastFourNumsInTheYear.substr(2,2);

        int intDay = std::stoi(stringDay);
        int intMonth = std::stoi(stringMonth);

        if (intMonth == 2) {
            if (!((isleap(std::stoi(currentStringOriginalYear)) && intDay < 30) || (!isleap(std::stoi(currentStringOriginalYear)) && intDay < 29))) {
                continue;
            }
        }
        if ((0 < intDay && intDay <= (31 - (intMonth - 1) % 7 % 2)) && (0 < intMonth && intMonth < 13)) {
            std::string potincailPolindrome = createDate(currentStringOriginalYear, stringMonth, stringDay);
            if (isPolindrome(potincailPolindrome)) {
                std::string datePolindrome = createOutputPolindromes(potincailPolindrome);
                Polindromes.push_back(datePolindrome);
            }
        }
    }




    return Polindromes;
}





int main(){
    for (std::string str : datePolindrom("06.22.1000", "06.22.2261")) {
        std::cout << str << "\n";
     }
    return 1;
}