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 close up of a baby with a tooth brush'. How many words start with the letter 'a' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a man skiing down a mountain on a sunny day'. How many words start with the letter 'm' in the sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a dog running with a frisbee in its mouth'. How many words start with the letter 'i' in the sentence.

SOLUTION:
2