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.

Sentence: 'a boy standing on sand and flying a green kite'. How many words start with the letter 'f' in the sentence.
1

Sentence: 'a very large carrot and a large knife'. How many words start with the letter 'l' in the sentence.
2

Sentence: 'some people standing in the snow while holding some ski poles'. How many words start with the letter 's' in the sentence.

5