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 fire truck and an ambulance driving down the street'. How many words start with the letter 'a' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a young man wearing glasses with a tooth brush in his mouth'. How many words start with the letter 'b' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'a hot dog sitting on a bun next to a hamburger and onion rings'. How many words start with the letter 'a' in the sentence.

SOLUTION:
4