A Grave is a dictionary with two keys:

'name': A string value with the grave's occupant's name

'message': A string value with the grave's message

Define a function named count$\_$shouters that consumes a list of graves and produces an integer representing the number of graves that had their messages in all capital letters. Hint: use the $.$upper$()$ method.

You are not required to document of unit test the function.