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: 'a man wiping out on a surfboard on a wave'. How many words start with the letter 'o' in the sentence.
[A]: 3


[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.
[A]: 2


[Q]: Sentence: 'a car covered in various empty toothpaste tubes'. How many words start with the letter 'a' in the sentence.
[A]:
1