Write a program that will read in a line of text up to 100 characters as string, and output the number of words in the line and the number of occurrences of each letter. Define a word to be any string of letters that is delimited at each end by whitespace, a period, a comma, or the beginning or end of the line. You can assume that the input consists entirely of letters, whitespace, commas, and periods. When outputting the number of letters that occur in a line, be sure to count upper- and lowercase versions of a letter as the same letter. Output the letters in alphabetical order and list only those letters that do occur in the input line. For example: I say Hi.