import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static int [] filterDuplicates(int [] data){
        ArrayList<Integer> integerList = new ArrayList<>();
        for(int i=0; i<data.length; i++){
            if(!integerList.contains(data[i]))
                integerList.add(data[i]);
        }
        
        int[] filter=new int[integerList.size()];
        for(int i=0; i<integerList.size(); i++)
            filter[i]=integerList.get(i);
        return filter;
    }
    
    public static void main(String[] args) {
        int[] filter = filterDuplicates(new int[]{7,3,6,4,3,3,4,9});
        for(int i=0; i<filter.length; i++)
            System.out.println(filter[i]);
    }
}