THIS IS TO BE WRITTEN IN MIPS

(50 points)

Write a program to accept a one-line string (maximum of 100 characters) from the keyboard. Edit the string entered in Part 1a (with code that you write) to remove all the white space, digits, punctuation, and other special characters, leaving only the letters. Print out the resulting compressed string to the screen.

Example: If the input string was If I've told you once, I've told you 1000 times!!Then the output string would be IfIvetoldyouonceIvetoldyoutimes

(50 points) Next, build a letter frequency table (you MUST use a 26 entry WORD integer array) that counts how many times each letter is used in your compressed sentence for Part 1. Count upper case letters as if they were lower case. Print out the numbers in this table to the screen starting with the frequency of "a" and continuing to the frequency of "z". Format the table output to consist of two horizontal lines with 13 numbers in each line. Separate the numbers on the line by a single space. The appropriate output here for the input example from Part 1, would be

Letter Frequency Table

0 0 1 2 4 1 0 0 4 0 0 21

1 5 0 0 0 1 3 2 2 0 0 20

Have the program handle multiple data sets and terminate execution when a null input string is entered.