Problem
Design a program that asks the user to enter a string. The string will then be displayed back to the user. This is followed by determining the number of alphabetic characters, numeric characters, lowercase letters, uppercase letters, whitespace characters and then displaying them. The user should be given additional chances to enter additional strings, and each time a string is entered, the above process is to be performed. The inputting is to stop, when the user enters "end" as the input string. At that point, total number of alphabetic characters, numeric characters, lowercase letters, uppercase letters, whitespace characters are to be displayed and the program terminated.