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 little boy sitting at a table with a spoon full of food'. How many words start with the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a person in a body of water with a surf board'. How many words start with the letter 'b' in the sentence.
[EX A]: 2

[EX 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.
[EX A]:
1