TASK DEFINITION: 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.
PROBLEM: Sentence: 'a brown dog sitting next to a brown cat on a bed'. How many words start with the letter 'a' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a woman is posing on a floor with a stuffed toy'. How many words start with the letter 'i' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'an evening scene shows power lines and stop lights'. How many words start with the letter 'p' in the sentence.

SOLUTION:
1