2503. Babelfish

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class Main{

    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(System.in);
        Map<String, String> dict = new HashMap<String, String>();

        while (in.hasNextLine()) {
            String str = in.nextLine();
            if (str.contains(" ")) {
                dict.put(str.split(" ")[1], str.split(" ")[0]);
            }
            else {
                if (str.isEmpty()) continue;
                if (dict.containsKey(str)) System.out.println(dict.get(str));
                else System.out.println("eh");
            }
        }
        in.close();
    }
}