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 number of motorcycles are on display at a museum'. How many words start with the letter 'o' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a man talks on the cellphone outside of a building'. How many words start with the letter 'o' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'two people sit on the beach with surfboards at their sides'. How many words start with the letter 't' in the sentence.
[EX A]:
3