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 man in an apron working in front of a fireplace'. How many words start with the letter 'a' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'a man is carrying a large case with him'. How many words start with the letter 'w' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'a long bus traveling between tall building on a city street'. How many words start with the letter 'b' in the sentence.

SOLUTION:
3