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 woman in a black tennis outfit playing tennis on a red clay court'. How many words start with the letter 'r' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a cat is laying in a bowl with a receipt'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a dog standing on the beach near the water'. How many words start with the letter 'n' in the sentence.
[EX A]:
1