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 kitchen with a sink and a dish rack'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a pitcher throwing a baseball during a baseball game'. How many words start with the letter 'b' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a stuffed teddy bear sitting on a stool'. How many words start with the letter 's' in the sentence.
[EX A]:
3