#include<stdio.h>
#include<string.h>
int main() {
    int n;
    scanf("%d", &n);
    char fruits[100][20];
    for(int i = 0; i < n; i++) {
        scanf("%s", fruits[i]);
    }
    char search[20];
    scanf("%s", search);
    int found = 0;
    for(int i = 0; i < n; i++) {
        if(strcmp(fruits[i], search) == 0) {
            found = 1;
            break;
        }
    }
    if(found) {
        for(int i = 0; i < n; i++) {
            printf("%s", fruits[i]);
            if(i < n-1)printf
        }
    }
}