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 person standing on a green field next to a river flying a kite'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'people in a field are looking up at a kite'. How many words start with the letter 'u' in the sentence.
1

Sentence: 'a man walks about in a quiet intersection with the traffic lights changing behind him'. How many words start with the letter 'i' in the sentence.

2

