#include<stdio.h>
#include<stdlib.h>

typedef struct Node{
    int data;
    struct Node *next;
}node;

node *head=NULL,*tail;

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

void display(){
   node *i;
   int cnt = 0;
   for(i=head;i!=NULL;i=i->next){
       if(i->data%2 == 0){
           printf("%d ",i->data);
           cnt++;
       }
   }
   if(!cnt){
       printf("Invalid input");
       return 0;
   }
}

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