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 man wearing a straw hat and a black shirt'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a street sign view in a very blurry picture'. How many words start with the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a good mixture of meat and vegetables on a plate'. How many words start with the letter 'p' in the sentence.


Output: 1