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 brown and white cat laying on blanket on door of open oven'. How many words start with the letter 'o' in the sentence.
5

Sentence: 'a group of people standing around an airplane on top of a field'. How many words start with the letter 'a' in the sentence.
5

Sentence: 'a dog wrestling a frisbee from a person'. How many words start with the letter 'a' in the sentence.

3

