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 person is standing by a pier near a fire hydrant'. How many words start with the letter 'p' in the sentence.
[A]: 2


[Q]: Sentence: 'some unfinished looking wood is in a white bathroom'. How many words start with the letter 'w' in the sentence.
[A]: 2


[Q]: Sentence: 'two sheep standing in the snow in a pen'. How many words start with the letter 'a' in the sentence.
[A]:
1