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2. Write a C program, problem1.c, to read in a text file, called text.txt, and build a concordance file, called concordance.txt, for the file showing the number of unique words, the unique words, and the number of times each unique word occurs in the text file. A word only has alphabetic characters. Test your program with text.txt files of differing contents. a. Example i. Text File-text.txt (test empty, one word, and larger text files) 1. A concordance of a text file is an alphabetical list of the unique words in the text file. ii. Concordance File - concordance.txt 1. There are 13 distinct words in the text file: 2. a 2 3. alphabetical 1 4. an 1 5. concordance 1 6. file 2 7. in 1 8. is 1 9. list 1 10. of 2 11. text 2 12. the 2 13. unique 1 14. words 1