gistfile1.txt

int main() {
    std::string st1, st2;
    getline(std::cin, st1);
    getline(std::cin, st2);

    std::unordered_map<char, char> map;

    if (st1.length() != st2.length()) {
        std::cout << "NO";
        return 0;
    }

    for (int i = 0; i < st1.length(); i++) {
        if (map.find(st1[i]) != map.end()) {
            if (map[st1[i]] != st2[i]) {
                std::cout << "NO";
                return 0;
            }
        } else {
            map[st1[i]] = st2[i];
        }
    }
    std::cout << "YES";
    return 0;
}