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: 'this is a dish of buttered asparagus with dressing'. How many words start with the letter 'o' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a cat sitting next to boxes of produce sitting in front of a store'. How many words start with the letter 's' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'there is a hat on the ground next to a fire hydrant'. How many words start with the letter 'a' in the sentence.
[EX A]:
2