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Print all the non-repeating words from the two given sentences
• Difficulty Level : Basic
• Last Updated : 04 Jun, 2021

Given two strings A and B, the task is to print all the non-repeating words out of the two given sentences.
Examples:

Input: A = “I have a blue pen”, B = “I got a red pen”
Output: have blue got red
Explanation:
The words have, blue, got and red have not been repeated in either the same sentence or another sentence.
Input: A = “I am going to park”, B = “I am in park”
Output: going to in

Approach: The idea is to iterate over all the words and check if the word is being repeated or not. Therefore, the following steps can be followed to compute the answer:

1. Concatenate both the string and store it in another string variable.
2. Extract one word from the concatenated string.
3. If that word is present in either A or in B, then print it. Else, continue for the remaining words.

Below is the implementation of the above approach:

## C++

 `// C++ program to print all the``// non-repeating words from the``// two given sentences` `#include ``#include ``using` `namespace` `std;` `// Function to print all the``// non-repeating words from the``// two given sentences``void` `removeRepeating(string s1, string s2)``{``    ``// Concatenate the two strings``    ``// into one``    ``string s3 = s1 + ``" "` `+ s2 + ``" "``;``    ``string words = ``""``;``    ``int` `i = 0;` `    ``// Iterating over the whole``    ``// concatenated string``    ``for` `(``auto` `x : s3) {``        ``if` `(x == ``' '``) {` `            ``// Searching for the word in A.``            ``// If while searching, we reach``            ``// the end of the string, then``            ``// the word is not present in``            ``// the string``            ``if` `(s1.find(words) == string::npos``                ``|| s2.find(words) == string::npos)``                ``cout << words;` `            ``// Initialise word for the``            ``// next iteration``            ``words = ``""``;``        ``}``        ``else` `{``            ``words = words + x;``        ``}``    ``}``}` `// Driver code``int` `main()``{``    ``string s1 = ``"I have go a pen"``;``    ``string s2 = ``"I want to go park"``;``    ``removeRepeating(s1, s2);``    ``return` `0;``}`

## Java

 `// Java program to print all the``// non-repeating words from the``// two given sentences``class` `GFG{` `// Function to print all the``// non-repeating words from the``// two given sentences``static` `void` `removeRepeating(String s1, String s2)``{``    ` `    ``// Concatenate the two Strings``    ``// into one``    ``String s3 = s1 + ``" "` `+ s2 + ``" "``;``    ``String words = ``""``;``    ``int` `i = ``0``;` `    ``// Iterating over the whole``    ``// concatenated String``    ``for``(``char` `x : s3.toCharArray())``    ``{``       ``if` `(x == ``' '``)``       ``{``           ` `           ``// Searching for the word in A.``           ``// If while searching, we reach``           ``// the end of the String, then``           ``// the word is not present in``           ``// the String``           ``if` `(!s1.contains(words) ||``               ``!s2.contains(words))``               ``System.out.print(words);``           ` `           ``// Initialise word for the``           ``// next iteration``           ``words = ``" "``;``       ``}``       ``else``       ``{``           ``words = words + x;``       ``}``    ``}``}` `// Driver code``public` `static` `void` `main(String[] args)``{``    ``String s1 = ``"I have go a pen"``;``    ``String s2 = ``"I want to go park"``;``    ` `    ``removeRepeating(s1, s2);``}``}` `// This code is contributed by sapnasingh4991`

## Python3

 `# Python 3 program to print all the``# non-repeating words from the``# two given sentences` `# Function to print all the``# non-repeating words from the``# two given sentences``def` `removeRepeating(s1, s2):` `    ``# Concatenate the two``    ``# strings into one``    ``s3 ``=` `s1 ``+` `" "` `+` `s2 ``+` `" "``    ``words ``=` `""``    ``i ``=` `0` `    ``# Iterating over the whole``    ``# concatenated string``    ``for` `x ``in` `s3:``        ``if` `(x ``=``=` `' '``):` `            ``# Searching for the word in A.``            ``# If while searching, we reach``            ``# the end of the string, then``            ``# the word is not present in``            ``# the string``            ``if` `(words ``not` `in` `s1 ``or``                ``words ``not` `in` `s2):``                ``print``(words, end ``=` `"")` `            ``# Initialise word for the``            ``# next iteration``            ``words ``=` `" "` `        ``else``:``            ``words ``=` `words ``+` `x` `# Driver code``if` `__name__ ``=``=` `"__main__"``:` `    ``s1 ``=` `"I have go a pen"``    ``s2 ``=` `"I want to go park"``    ``removeRepeating(s1, s2)` `# This code is contributed by Chitranayal`

## C#

 `// C# program to print all the``// non-repeating words from the``// two given sentences``using` `System;``class` `GFG{`` ` `// Function to print all the``// non-repeating words from the``// two given sentences``static` `void` `removeRepeating(``string` `s1,``                            ``string` `s2)``{``     ` `    ``// Concatenate the two Strings``    ``// into one``    ``string` `s3 = s1 + ``" "` `+ s2 + ``" "``;``    ``string` `words = ``""``;``    ``int` `i = 0;`` ` `    ``// Iterating over the whole``    ``// concatenated String``    ``foreach``(``char` `x ``in` `s3.ToCharArray())``    ``{``       ``if` `(x == ``' '``)``       ``{``            ` `           ``// Searching for the word in A.``           ``// If while searching, we reach``           ``// the end of the String, then``           ``// the word is not present in``           ``// the String``           ``if` `(!s1.Contains(words) ||``               ``!s2.Contains(words))``               ``Console.Write(words);``            ` `           ``// Initialise word for the``           ``// next iteration``           ``words = ``" "``;``       ``}``       ``else``       ``{``           ``words = words + x;``       ``}``    ``}``}`` ` `// Driver code``public` `static` `void` `Main(``string``[] args)``{``    ``string` `s1 = ``"I have go a pen"``;``    ``string` `s2 = ``"I want to go park"``;``     ` `    ``removeRepeating(s1, s2);``}``}` `// This code is contributed by rutvik_56`

## Javascript

 ``
Output:
`have a pen I want to park`

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