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 close up of a baby with a tooth brush'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a woman that is holding up a banana'. How many words start with the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'on one plate there is glazed donut and on the other plate there is mug of hot chocolate with a leaf shape swirled in it'. How many words start with the letter 's' in the sentence.
[EX A]:
2