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 silver blue and red jet is flying over a fence'. How many words start with the letter 'f' in the sentence.
[A]: 2


[Q]: Sentence: 'a boy in a red baseball uniform throws a ball'. How many words start with the letter 'b' in the sentence.
[A]: 3


[Q]: Sentence: 'a woman holding a sign sitting on top of a truck'. How many words start with the letter 't' in the sentence.
[A]:
2