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: 'two elephants with people riding on them next to block barriers'. How many words start with the letter 'o' in the sentence.
[A]: 1


[Q]: Sentence: 'a group of people and cow outside of a hut'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a dog sitting in a window looking at a vehicle'. How many words start with the letter 'a' in the sentence.
[A]:
4