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 green mail box sitting next to a white brick building'. How many words start with the letter 'b' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'the men are playing tennis on the court'. How many words start with the letter 'o' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a television and some people playing with remotes'. How many words start with the letter 'a' in the sentence.
[EX A]:
2