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 meal of a peanut butter and jelly sandwich with poprocks mixed in'. Count the number of vowels in the given sentence.
20

Sentence: 'a baby playing with a toy and a toothbrush'. Count the number of vowels in the given sentence.
12

Sentence: 'a man riding on the back of an elephant'. Count the number of vowels in the given sentence.

12