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.

Example Input: Sentence: 'a couple of giraffes are standing in a grassy field'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'several baskets of various fruits that are on display'. Count the number of consonants in the given sentence.
Example Output: 27

Example Input: Sentence: 'a group of people standing by elephants for a photo'. Count the number of consonants in the given sentence.
Example Output:
26