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 person takes a picture of a reflection in a mirror in the dark'. How many words start with the letter 'p' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a man holding onto a kite for a woman in the yard'. How many words start with the letter 'o' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a convection oven sitting on top of a dining table'. How many words start with the letter 'o' in the sentence.
[EX A]:
3