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 little boy sitting at a table with a spoon full of food'. How many words start with the letter 's' in the sentence.

Output: 2


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 man in red shirt playing on beach with a frisbee'. How many words start with the letter 'a' in the sentence.


Output: 2