Answer Happy

Input:
Output:
The program will print to standard output the list of words that
appear at least twice in the original input in the order that they
appear in the input.
Write a C program to implement the following requirement: Input: The program will read from standard input any text up to 10,000 characters and store each word (a string that does not contain any whitespace with a maximum of 100 characters) into a node of a linked list, using the following struct: struct NODE { char *word; Struct NODE *next; }; Output: The program will print to standard output the list of words that appear at least twice in the original input in the order that they appear in the input. Note: If there is nothing from stdin, print nothing. SAMPLE INPUT This is a sample input. This Is a sample output. This is the end. SAMPLE OUTPUT This, a, sample