import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;



class SLLNode {
	protected int id;
	protected int plata;
	protected SLLNode succ;
    boolean element;

	public SLLNode(int id,int plata, SLLNode succ) {
		this.id = id;
		this.plata=plata;
		this.succ = succ;
	}


}

class SLL {
	private SLLNode first;
    private Object tmp;

	public SLL() {
		// Construct an empty SLL
		this.first = null;
	}

	public void deleteList() {
		first = null;
	}

	public int length() {
		int ret;
		if (first != null) {
			SLLNode tmp = first;
			ret = 1;
			while (tmp.succ != null) {
				tmp = tmp.succ;
				ret++;
			}
			return ret;
		} else
			return 0;

	}


	public void insertFirst(int id, int plata) {
		SLLNode ins = new SLLNode(id,plata, first);
		first = ins;
	}

	public void insertLast(int id,int plata) {
		if (first != null) {
			SLLNode tmp = first;
			while (tmp.succ != null)
				tmp = tmp.succ;
			SLLNode ins = new SLLNode(id, plata, null);
			tmp.succ = ins;
		} else {
			insertFirst(id,plata);
		}
	}

	public SLLNode getFirst() {
		return first;
	}


	public SLL brisi_pomali_od(int iznos,SLL lista1) {
		// Vasiot kod tuka
            SLL lista3 = new SLL();
            SLLNode poc = lista1.getFirst();


        while(poc!=null){
            if(poc.plata >= iznos){
               lista3.insertLast(poc.id,poc.plata);
               poc=poc.succ;
                //lista3.insertLast(poc.succ);
            }

            else{
                poc=poc.succ;
            }
        }
        if(lista3.getFirst()==null){
            System.out.println("nema");
        }
    	return lista3;
	}

	public SLL sortiraj_opagacki(SLL lista1) {
    	// Vasiot kod tuka
        SLL lista = new SLL();
        SLLNode tmp = lista1.getFirst();
        SLLNode min;

        while(lista1.getFirst()!=null){
            tmp=min=lista1.getFirst();
            while(tmp!=null){
                if(tmp.id > min.id){
                    min=tmp;

            }
            else {
                    tmp=tmp.succ;
               // lista.insertLast(tmp.succ.id,tmp.succ.plata);
            }
                 }
             lista.insertLast(min.id,min.plata);
             delete(min);
        }
    	return lista;
	}
    public void pecati (SLL lista)
    {
    	SLLNode p=lista.first;
    	while(p!=null)
    	{
    		System.out.println(p.id+" "+p.plata);
    		p=p.succ;
    	}
    }

    private void insertLast(SLLNode succ) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    private void delete(SLLNode min) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}
public class SLLKompanija {
	public static void main(String[] args) throws IOException {

		SLL lista1 = new SLL();
		BufferedReader stdin = new BufferedReader(new InputStreamReader(
				System.in));
		String s = stdin.readLine();
		int N = Integer.parseInt(s);

		for (int i = 0; i < N; i++) {
			s=stdin.readLine();
			String s1=stdin.readLine();
			lista1.insertLast(Integer.parseInt(s),Integer.parseInt(s1));
		}
		s = stdin.readLine();

		lista1=lista1.brisi_pomali_od(Integer.parseInt(s),lista1);
		if(lista1!=null)
        {
		    lista1=lista1.sortiraj_opagacki(lista1);
		    lista1.pecati(lista1);
        }

	}
}