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 riding a skateboard down a street'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'the colorful fruit is laid out in boxes'. How many words start with the letter 'i' in the sentence.
2

Sentence: 'a couple with a striped umbrella standing outside a store'. How many words start with the letter 'c' in the sentence.

1