import java.util.Scanner;
public class Targil24
{
        public static String smarty(String tamlilim)
        {
        int i=0,WordsCount=0,d=0;
        String newstr="",temp="";
        tamlilim=tamlilim+" ";

        while(i<=tamlilim.length()-1)
         {
          if(tamlilim.charAt(i)==' ')
            WordsCount++;
            i++;
         }
         String [] str = new String[WordsCount+1];
         i=0;
         while(i<=tamlilim.length()-1)
         {
         if(tamlilim.charAt(i)==' ')
         {
         str[d]=temp;
         temp="";
          d++;
        }
         else
         {
          temp=temp+tamlilim.charAt(i);
        }
          i++;
         }
         for(i=0;i<WordsCount;i++)
          {
                         if(str[i].equals(str[i+1])==false)
           newstr=newstr+str[i]+" ";


    }


         return newstr;
         }
        {
}
	static Scanner reader=new Scanner(System.in);
	public static void main(String[] args)
	{
		Scanner in= new Scanner (System.in);
		String a;
		System.out.println("הכנס משפט:");
		a=in.nextLine();
		System.out.print(smarty(a));
	}

}