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: 'this is a living room table with several large chairs placed around it'. How many words start with the letter 'a' in the sentence.
[A]: 2

[Q]: Sentence: 'a crowd of people on the street one of which is taking pictures with a cell phone'. How many words start with the letter 'o' in the sentence.
[A]: 4

[Q]: Sentence: 'a couple of people on skis stand in the snow'. How many words start with the letter 's' in the sentence.
[A]:
3