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 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 man wearing glasses collecting samples in a container in a forest'. How many words start with the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'two people riding a scooter surrounded by big red buses'. How many words start with the letter 'r' in the sentence.


Output: 2