// C++ program to remove duplicate
// word from string
#include <bits/stdc++.h>
using namespace std;

void removeDupWord(string str)
{
    // Used to split string around spaces.
    istringstream ss(str);

    // To store individual visited words
    unordered_set<string> hsh;

    // Traverse through all words
    do {
        string word;
        ss >> word;

        // If current word is not seen before.
        while (hsh.find(word) == hsh.end()) {
            cout << word << " ";
            hsh.insert(word);
        }

    } while (ss);
}

// Driver function
int main()
{
    string str = "Geeks for Geeks A Computer"
                 " Science portal for Geeks";
    removeDupWord(str);
    return 0;
}

// Java program for the above approach
import java.util.*;

public class Main {

  static void removeDupWord(String str)
  {

    // Used to split string around spaces.
    StringTokenizer st = new StringTokenizer(str);

    // To store individual visited words
    Set<String> hsh = new HashSet<>();

    // Traverse through all words
    while (st.hasMoreTokens()) {
      String word = st.nextToken();

      // If current word is not seen before.
      while (!hsh.contains(word)) {
        System.out.print(word + " ");
        hsh.add(word);
      }
    }
  }

  public static void main(String[] args) {
    String str = "Geeks for Geeks A Computer"
      + " Science portal for Geeks";
    removeDupWord(str);
  }
}

// This code is contributed by codebraxnzt

def remove_dup_word(string):
    # Used to split string around spaces.
    words = string.split()
    
    # To store individual visited words
    hsh = set()

    # Traverse through all words
    for word in words:
        # If current word is not seen before.
        if word not in hsh:
            print(word, end=" ")
            hsh.add(word)

# Driver function
if __name__ == '__main__':
    string = "Geeks for Geeks A Computer Science portal for Geeks"
    remove_dup_word(string)

// C# program to remove duplicate
// word from string
using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void RemoveDupWord(string str)
    {
        // Split the string into 
        // individual words.
        string[] words = str.Split(' ');
        // To store individual visited words
        HashSet<string> hashSet = new HashSet<string>();
        // Traverse through all words
        foreach (string word in words)
        {
            // If current word is not seen before.
            if (!hashSet.Contains(word))
            {
                Console.Write(word + " ");
                hashSet.Add(word);
            }
        }
    }
    static void Main(string[] args)
    {
        string str = "Geeks for Geeks A Computer " +
                     "Science portal for Geeks";
        RemoveDupWord(str);
    }
}

// JavaScript program to remove duplicate
// word from string

function removeDupWord(string) {
  // Used to split string around spaces.
  const words = string.split(" ");
  
  // To store individual visited words
  const hsh = new Set();

  // Traverse through all words
  for (const word of words) {
    // If current word is not seen before.
    if (!hsh.has(word)) {
      process.stdout.write(word + " ");
      hsh.add(word);
    }
  }
}

// Driver function
const string = "Geeks for Geeks A Computer Science portal for Geeks";
removeDupWord(string);

// Contributed by adityasharmadev01