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: 'person surfing in the sea on the surfboard'. How many words start with the letter 's' in the sentence.
[A]: 3


[Q]: Sentence: 'a bed sitting next to a window with a wooden headboard'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a dark colored dog sitting on blanket and looking up'. How many words start with the letter 'd' in the sentence.
[A]:
2