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 person taking a slice of pizza from a pie'. How many words start with the letter 'p' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'railway train passenger cars with graffiti parked on a gravel lot'. How many words start with the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'view of the background from a rearview mirror'. How many words start with the letter 'v' in the sentence.


Output: 1