#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("energii.in");
ofstream fout("energii.out");
int main()
{   int i,g,w,egi[4],cgi[4];
    fin>>g;
    fin>>w;
    for(i=1;i<=g;i++)
    {
        fin>>egi[i];
        fin>>cgi[i];
    }
    for(i=1;i<=g;i++)
    {
        if(egi[i]==w)
        {
            fout<<" "<<cgi[i];
        }
    }

    return 0;
}