Define a function max_even_digs(.) which receives as input one string containing digits, letters or special symbols.

Define a function max_even_digs(..) which receives as input one string containing digits, letters or special symbols.The function should return an integer number containing the maximum value among all the even digits in the string. If there are no even digits in the string, the function should return -1

As an example, the following code fragment:

print (max_even_digs("a1b8c9!$4"))

should produce the output:

8