instruction:
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.
question:
Sentence: 'a brown dog greeting a lamb on a green field'. Count the number of vowels in the given sentence.
answer:
14


question:
Sentence: 'groups of people in a field sitting down, standing and walking, with tent areas in the background'. Count the number of vowels in the given sentence.
answer:
28


question:
Sentence: 'three whole cakes sitting next to three slices of cake'. Count the number of consonants in the given sentence.
answer:

28