# include <iostream>
# include <cstring>
#include <cctype>
using namespace std;
struct train
{
    char item[15];
    int number;
    char time[6];
};
int main()
{
    train inf[100];
    int j, n, i;
    char nom[15];
    bool flag=false;
    cin >> n;
    if(n >= 1 && n <= 1001)
{for(j=0; j < n; j++)
{cin>>inf[j].number >> inf[j].item >> inf[j].time;
for(int i = 0; i<strlen(inf[j].item); i++)
{ inf[j].item[i] = (char)toupper(inf[j].item[i]);}}}
    for(j = 0; j < n; j++)
    {int x = n-1; do
{if(stricmp(inf[x].item, inf[x-1].item)==0)
{ return 0; }
x--;}
while (x > 0);
    }
    cin>>nom;
    for (i=0; i<n; i++){
if (stricmp(nom, inf[i].item)==0)
{ flag = true;
cout << inf[i].number <<"_"<< inf[i].item <<"_"<< inf[i].time;}
}
    if (flag==false)
    {
        cout<<"Impossible";
    }
    return 0;

}