#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
    
}s1;

s1 *head=NULL,*tail=NULL;

void create(int num){
    s1 *new=(s1*)malloc(sizeof(s1));
    new->data=num;
    new->next=NULL;
    if(head==NULL){
        head=new;
        tail=new;
    }else{
        tail->next=new;
        tail=new;
    }
}

void display(int val){
    s1 *i;
    for(i=head;i!=NULL;i=i->next){
        if(i->data == val)
            printf("%d ",i);
        else{
            printf("-1");
            return 0;
        }
    }

}

int main(){
    int size,num,val;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    for(int i=1;i<=size;i++){
        if(!scanf("%d ",&num)){
            printf("Invalid input");
            return 0;
        }
        create(num);
    }
    scanf("%d",&val);
    display(val);
}