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 very cute long haired dog laying on a pillow'. How many words start with the letter 'v' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'car pass threw a green light in the day light'. How many words start with the letter 'd' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a young soccer player is preparing for the kick'. How many words start with the letter 'p' in the sentence.
Output: 2