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: 'the men are holding on to surfboards outside'. How many words start with the letter 'o' in the sentence.
[EX A]: 2

[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 hound dog is riding in the back of a green pickup truck'. How many words start with the letter 'd' in the sentence.
[EX A]:
1