import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; /* Модернизация ПО */ public class Solution { public static void main(String[] args) { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); List<String> family = new ArrayList<String>(); List<String> sity = new ArrayList<String>(); String s=""; try{ int i=0,a=0,b=0; while (true) { s = reader.readLine(); if (s.isEmpty()) { break; } if(i%2==0){ family.add(a,s); a++; }else{ sity.add(b,s); b++; } i++; } reader.close(); }catch(Exception e){} // Read the house number try{ reader = new BufferedReader(new InputStreamReader(System.in)); s=reader.readLine(); reader.close(); }catch(Exception e){} for(int i=0;i<family.size();i++){ if(s.equals(family.get(i))){ System.out.println(sity.get(i)); break; } } } }