#include <iostream>
#include <cstring>
using namespace std;
int main(){
int n,i;
char cuv[20][20];
bool exista=0;
//Citire date
cin >> n;
for(i=0;i<n;i++) cin >> cuv[i];
//Afisare cuvinte care sunt prefixe
for(i=0;i<n-1;i++){
if(strstr(cuv[i],cuv[n-1])==cuv[i]){
cout << cuv[i] << " ";
exista=1;
}
}
if(!exista) cout << "nu exista";
}
