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: 'the group of people are getting ready to ski down the mountainside'. How many words start with the letter 't' in the sentence.
[EX A]: 3

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

[EX Q]: Sentence: 'a person doing a trick in the water'. How many words start with the letter 'i' in the sentence.
[EX A]:
1