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 group of people sitting at a long table in  a wine cellar'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a couple of people sitting on a couch plays with a wii remote'. How many words start with the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a large sandwich with meat cheese and vegetables'. How many words start with the letter 'v' in the sentence.


Output: 1