Write a program that prompts the user to enter a three letter word using the following prompt:

prompt = "Please enter a three letter word: " 

Each letter in the word the user enters is assigned a score based on the position of the letter in the alphabet. The letter "a" would have a score of 1, the letter "b" would have a score of 2 and so on. The program calculates the total word score by summing the individual letter scores. The total is then printed. Some examples of the program being run are shown below.

Note the following:

• You can assume that the user will always enter a string of length 3, where each character is an alphabetical character.
• You will need to convert all the characters in the string to lowercase using the lower() string method.

For example:

Input	Result
DoG	Please enter a three letter word: DoG The word DoG has a score of 26
CAt	Please enter a three letter word: CAt The word CAt has a score of 24