import java.util.Scanner;

public class DuplicateWords {

public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int numSentences = Integer.parseInt(in.nextLine());

    while (numSentences-- > 0) {
        String input = in.nextLine();    
        String[] arr = input.split(" ");
        String[] res = new String [arr.length];
        int i = 0;
        for(String item : arr ){                
            boolean found = false;
                
            for (String  term :  res )
                if ( term != null && term.equalsIgnoreCase(item))
                    found = true;
                
            if ( found == false )
                res[i] = item;
            i++;
        }
        
        input = "";        
        for (String  term : res )
            if (term != null)
                input += term + " ";
            
        System.out.println(input);
    }
    in.close();
}
}