Simple Crossword Helper -- crossword This is a simple application to be written as a bash script to help those who work on crossword puzzles. In a previous lab you saw how to find words that satisfy a variety of constraints in the Linux dictionary, /usr/share/dict/ words. This script should run continuously using a loop ; each time through the loop, the script should prompt the user to enter the known and unknown letters in the word, using ' - ' for each unknown letter. After the user has entered the pattern followed by the "Enter" key, the script shou ld list all words in the Linux dictionary that match the entered pattern. The script should prompt the user if the user wants to continue or not, if yes, the script continue runs; if not, then the script terminates. The script takes no arguments and should be named crossword ; save in your ee462 directory in your AFS file space when done. HINT: use command substitution to modify the value of t he user input by echoing the value into a command that converts it to a form more useful for processing.