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: '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.
[EX A]: 4

[EX Q]: Sentence: 'japanese food of meat and vegetable are on a plate'. How many words start with the letter 'o' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a living room with wooden furniture and a fireplace'. How many words start with the letter 'f' in the sentence.
[EX A]:
2