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: 'man playing tennis on dirt court outside in the sun'. How many words start with the letter 'd' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'an officer sits on a brown horse on a city street'. How many words start with the letter 'o' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'some people are flying kites at the beach'. How many words start with the letter 's' in the sentence.
[EX A]:
1