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 boy wearing blue has a skateboard in the air near a black railing'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'mounds of plantains are on display at market stalls'. How many words start with the letter 'm' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a boy is getting ready to throw a frisbee'. How many words start with the letter 'r' in the sentence.


Output: 1