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: 'there is a bird standing on a rocky shore'. How many words start with the letter 'a' in the sentence.
[A]: 2


[Q]: Sentence: 'a silver and blue amtrak train sitting below tall buildings'. How many words start with the letter 'b' in the sentence.
[A]: 3


[Q]: Sentence: 'two cats are sitting next to a window with one on the window sill'. How many words start with the letter 't' in the sentence.
[A]:
3