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 zebra walking past a  rhino in dirt'. How many words start with the letter 'd' in the sentence.
1

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

Sentence: 'parking meter with nine minutes left and red car'. How many words start with the letter 'c' in the sentence.

1