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.

[EX Q]: Sentence: 'a man putting a protective covering over a large tv screen'. How many words start with the letter 'l' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'three chefs talking to each other at a bar'. How many words start with the letter 't' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'street signs clutter a pole on an empty street'. How many words start with the letter 's' in the sentence.
[EX A]:
3