Cacher is the code snippet organizer for pro developers

import java.util.*;  
  
public class Main {  
  
    public static void main(String[] args) {  
        Scanner scn = new Scanner(System.in);  
        int nun=Integer.parseInt(scn.nextLine());
        while(nun--!=0){
        	String str=scn.nextLine().toLowerCase(),arr[]=str.split(" ");   
        	int j=0;
            for(int i =0;i<arr.length;i++){  
                 for(j=i-1;j>=0;j--){  
                     if(arr[i].equals(arr[j]))break;  
                 }  
                 if(j==-1&&i>0)
                	 System.out.print(" ");  
                 if(j==-1)
                	 System.out.print(arr[i]);  
                   
            }  
            
            System.out.println(); 
        }
    }  
}