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 person is kite surfing on calm water while it is cloudy'. How many words start with the letter 'k' in the sentence.
[A]: 1


[Q]: Sentence: 'person in profile and sunlight at a barred window'. How many words start with the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'a man plays frisbee with some other people in a gymnasium'. How many words start with the letter 'f' in the sentence.
[A]:
1