#include<stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    int arr[n];
    for(int i=0;i<n;i++){
        scanf("%d",&arr[i]);
    }
    int d,found=0;
    scanf("%d",&d);
    for(int i=0;i<n;i++){
        if(arr[i]==d){
            found=1;
            break;
        }
    }
    if(found){
        printf("marble not found");
        return 0;
    }
  for(int i=0;i<n;i++){
        if(arr[i]==d){
      
        printf("%d " ,arr[i]);
    }
}