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

[Q]: Sentence: 'a train station with a train sitting there waiting to be loaded'. How many words start with the letter 't' in the sentence.
[A]: 4

[Q]: Sentence: 'a man riding a skateboard down a sidewalk'. How many words start with the letter 'a' in the sentence.
[A]:
3