#include<stdio.h>
int main() {
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    int rolls[20],unique[20];
    int i,j,k=0;
    int found;
    for(i=0;i<n;i++){
        found=0;
        for(j=0;j<k;j++){
            if(rolls[i]==unique[j]){
                found=1;
                break;
            }
        }
        if(!found){
            unique[k]=rolls[i];
            k++;
        }
    }
    for( int i=o;i<k;i++){
        printf("%d\n",unique[i]);
    }
    return 0;
}