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 takes a picture of a reflection in a mirror in the dark'. How many words start with the letter 'p' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a beautiful young lady eating a candy apple on an amusement park ride'. How many words start with the letter 'a' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a lit red stop lite under a blue sky'. How many words start with the letter 'a' in the sentence.


Output: 2