How to correctly define a function?

Question

In python I\'m trying to do the following to define a function:

count_letters(word) = count_vowels(word) + count_consonants(word)

But for

Answer 1

having defined function: count_vowels(word) and count_consonants(word)

then you can do this: count_letters = count_vowels(word) +count_consonants(word)

hope it help! thanks