#include <fstream>
using namespace std;
ifstream f("conturi.in");
ofstream g("conturi.out");
int n,x,i,v[101];
int main()
{
    f>>n>>x;int max=-124828235;
    for(i=1;i<=n;i++)
    f>>v[i];
    for(i=1;i<=n;i++)
    {
        if(v[i]/100000==x && (v[i]/10000)%10==1 && max<v[i]%10000)
        max=v[i]%10000;
    }
    g<<max;
    return 0;
}