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 at a restaurant smiling while preparing pizzas'. How many words start with the letter 'p' in the sentence.
[A]: 2


[Q]: Sentence: 'the two women were sitting on a blanket beside the river'. How many words start with the letter 't' in the sentence.
[A]: 3


[Q]: Sentence: 'a person on a skateboard on a street doing a trick'. How many words start with the letter 'a' in the sentence.
[A]:
4