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 group of people and cow outside of a hut'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a green place mat sitting on a table with a couple of plates of food and a drink placed upon it'. How many words start with the letter 'p' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'motorcyclists riding down the street in a city'. How many words start with the letter 'a' in the sentence.
[EX A]:
1