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.

Input: Consider Input: Sentence: 'a young boy hits a baseball during a game'. How many words start with the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'horses are being walked around a race track'. How many words start with the letter 't' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a pair of polar bears gazing at each other while in a field of snow'. How many words start with the letter 'p' in the sentence.


Output: 2