Write a PYTHON PROGRAM which

$->$ prompts the user for a $4$ upper$-$case letters word

$->$ prints the same word all in lower case

You have to implement the following algorithm:

$->$Convert the characters to their ASCII equivalent integer

$->$Add or subtract the necessary number to get the ASCII number of the corresponding lower case letter

$->$Convert the integers back to characters.

$->$Put together the lower case letters to obtain the word

$->$Print the result strictly following the sample below:

$1$ Please enter a four upper$-$case character string: KENT

$2$ The string in lower case is 'kent'.

Important Note:

There exists functions to convert letter cases. DO NOT use them at this stage. We will introduce them later on in the course and use

them for other problems.

General Note:

At least one provided test compares prompts and output for an exact match, including spacing and punctuation

When the user enters invalid input $($string contains non$-$alphabetic characters, string is shorter or longer than $4$ characters, $...)$ the program

may error$-$out or produce wrong results. This is acceptable for this problem.