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 green mail box sitting next to a white brick building'. How many words start with the letter 'b' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'a man and three children playing with a kite on the grass and other people riding bikes on a nearby road'. How many words start with the letter 'a' in the sentence.

SOLUTION: 5

PROBLEM: Sentence: 'a hand touching a tablet computer on a table'. How many words start with the letter 'a' in the sentence.

SOLUTION:
3