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 sandwich vegetables and a beer sitting on a table'. How many words start with the letter 'a' in the sentence.
[A]: 4


[Q]: Sentence: 'a person kneeling down under a green umbrella'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'two packaged frozen pizzas that are on a cookie sheet and the boxes behind the pizzas'. How many words start with the letter 't' in the sentence.
[A]:
4