In this task, you need to count the number of vowels (letters 'a', 'e', 'i', 'o', 'u') / consonants (all letters other than vowels) in the given sentence.

Sentence: 'a woman wearing blue is on the phone and walking along a sidewalk in front of a building with black planters on both sides of the entrance'. Count the number of vowels in the given sentence.
42