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 group of four skiers are getting ready to embark'. How many words start with the letter 'g' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'two men on ski boards in the midst of a blizzard'. How many words start with the letter 's' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a couple of people that are on a skateboard'. How many words start with the letter 'o' in the sentence.
[EX A]:
2