#include<stdio.h>
int main(){
    int n;
    scanf("%d", &n);
    if(n < 0) {
        printf("Invalid input");
        return 0;
    }
    int arr[n], result[n];
    int i, j, k = 0;
    int isduplicate;
    for (i = 0; i < n; i++){
        scanf("%d", &arr[i]);
    }
    for (i = 0; i < n; i++){
        scanf("%d", &arr[i]);
    }
    for(i = 0; i < n; i++){
        isduplicate = 0;
        for (j = 0; j < k; j++){
            if (arr[i] == result[j]){
                isduplicate = 1;
                break;
            }
    }
    if(!isduplicate){
      result[k++] = arr[i];
    }
     for (int i = 0;i < k; i++){
      printf("%d",result[i]);
    }
    
    
    
    
    return 0;
}