import java.util.*;
public class Main{
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        int n=0;
        if(sc.hasNextInt()){
            n=sc.nextInt();
        }
        if(n<=0){
            System.out.println("Invalid input");
            return;
        }
        sc.nextLine();
        LinkedHashMap<String,Integer>
        catalog=new LinkedHashMap<>();
        for(int i=0;i<n;i++){
            String line=sc.nextLine().trim();
            int lastSpace=line.lastIndexOf(' ');
            
            int lastSpace=line.lastIndexOf(" ");
            String name=parts[0];
            int price=Integer.parseInt(parts[1]);
            catalog.put(name,price);
        }
        String removeProduct=sc.nextLine().trim();
        if(!catalog.containsKey(removeProduct)){
            System.out.println("-1");
            return;
        }
        catalog.remove(removeProduct);
        for(Map.Entry<String,Integer> entry:catalog.entrySet()){
            System.out.println(entry.getKey()+" "+entry.getValue());
        }
    }
}