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 sandwich vegetables and a beer sitting on a table'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a white dog laying in an open suitcase'. How many words start with the letter 'i' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a mean wearing a tie standing near a bookshelf'. How many words start with the letter 'a' in the sentence.


Output: 3