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: 'a computer with a farm on the screen on top of a desk'. How many words start with the letter 'o' in the sentence.
[A]: 3


[Q]: Sentence: 'a man on a beach throwing a frisbee while two people walking the water'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'people are sitting and eating various foods in front of a blue building'. How many words start with the letter 's' in the sentence.
[A]:
1