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: 'some children's toys are sitting by a baby carriage'. Count the number of consonants in the given sentence.
27

Sentence: 'a skateboarder skating down a steep hill marked with cones'. Count the number of consonants in the given sentence.
31

Sentence: 'an big elephant and small elephant walk against the tall grass'. Count the number of consonants in the given sentence.

35