In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

[EX Q]: Sentence: 'a guy squatting down and tapping his food with a woman sitting down'. How many words start with the letter 'f' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a person holding a cell phone in their hand'. How many words start with the letter 'h' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a brown horse is grazing behind a fence'. How many words start with the letter 'a' in the sentence.
[EX A]:
2