Write a program ex719.java that will input a string (that could include spaces) with a BufferedReader. We want to see what the string would be backward (ex. "java class" would be "ssalc avaj"). The StringBuffer has a method to reverse itself. So change the inputted string into a string buffer and then reverse the string buffer. Print the labeled string buffer as the reverse of the inputted string. If needed, check the lab exercises, notes, book, or Java Oracle Online Reference to look up how to use the appropriate string, string buffer, or buffered reader methods. Run your program with the following string and save the output as ex719.txt. Attach your ex719.java file and the output ex719.txt output text file and submit.

Input: Four score and seven years ago