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: 'an orange and white scooter carrying two passengers drives down a wet street while the passenger of the scooter holds a purple umbrella'. How many words start with the letter 'a' in the sentence.

SOLUTION: 4

PROBLEM: Sentence: 'two men are riding horses on a beach'. How many words start with the letter 'r' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'an army truck with soldiers and guns pointed at a demonstration'. How many words start with the letter 'd' in the sentence.

SOLUTION:
1