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.

[Q]: Sentence: 'a group of people sitting at a long table in  a wine cellar'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'a person standing on a tennis court holding a tennis racket'. How many words start with the letter 'c' in the sentence.
[A]: 1


[Q]: Sentence: 'many people standing on a city street near buildings'. How many words start with the letter 'b' in the sentence.
[A]:
1