import java.util.*;

public class Lab3 {
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter the text:");
        StringBuilder sb = new StringBuilder(scanner.nextLine());
        System.out.println(deleteDuplicatesFromString(sb));
    }

    public static String deleteDuplicatesFromString(StringBuilder inputString){
        String[] words = inputString.toString().split(" ");
        inputString.delete(0, inputString.length());
        if(inputString.length() < 2 || inputString == null){
            return inputString.toString();
        }
        else{
            for(String word : words){
                char distChar = word.charAt(0);
                inputString.append(distChar);
                for(int i = 0; i < word.length(); i++){
                    if(distChar != word.charAt(i)){
                        inputString.append(word.charAt(i));
                    }
                }
                inputString.append(" ");
            }
            return inputString.toString();
        }
    }
}