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: 'an orange and white scooter carrying two passengers drives down a wet street while the passenger of the scooter holds a purple umbrella'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'woman standing on the beach with a large sailboat behind her'. How many words start with the letter 's' in the sentence.
[A]: 2


[Q]: Sentence: 'young man getting haircut from adult in black and white photo'. How many words start with the letter 'y' in the sentence.
[A]:
1