#include <iostream>
#include <regex>
#include <string>
#include <sstream>
#include <unordered_set>
#include <vector>

std::vector<std::string> split(const std::string& input, const std::string& regex) {
    std::regex re(regex);
    std::sregex_token_iterator
            first{input.begin(), input.end(), re, -1},
            last;
    return {first, last};
}


int main() {
    std::string s1, s2;
    std::getline(std::cin, s1);
    std::getline(std::cin, s2);

    auto words1 = split(s1, " +");
    auto words2 = split(s2, " +");
    std::unordered_set<std::string> sec_str_words;
    std::unordered_set<std::string> used_words;
    for (auto&& word : words2) {
        sec_str_words.insert(word);
    }

    for (auto&& word : words1) {
        if (sec_str_words.count(word) != 0 && used_words.count(word) == 0) {
            std::cout << word << std::endl;
            used_words.insert(word);
        }
    }
    return 0;
}