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 zeppelin flying in the air as a water spouts occurs in a city lake'. How many words start with the letter 'a' in the sentence.
5

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

Sentence: 'a night shot of a man standing on the side of a road'. How many words start with the letter 'o' in the sentence.

3