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 tennis player swings his racket on a serve'. How many words start with the letter 'o' in the sentence.
1

Sentence: 'a colorful sculpture of an elephant in a park'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a man in a carnival outfit posing for a picture'. How many words start with the letter 'i' in the sentence.

1