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 street is packed with people walking; many have umbrellas open'. Count the number of consonants in the given sentence.
33

Sentence: 'birds are in the water and sticking their heads in'. Count the number of consonants in the given sentence.
26

Sentence: 'two guys are jumping to catch a frisbee on a crowded beach'. Count the number of vowels in the given sentence.

18