city population

import java.util.*;
import java.io.*;
import java.math.*;

class Solution {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        Map<String, Integer> map = new HashMap<>();
        for (int i = 0; i < n; i++)
        {
            String city = in.next();
            int population = in.nextInt();
            map.put(city, population);
        }
        in.nextLine();
        String search = in.nextLine();
        int sum = 0;
        for(String x : map.keySet())
            if(x.indexOf(search) != -1)
                sum += map.get(x);

        System.out.println(sum);
    }
}