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 and cow outside of a hut'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a couple of people that are playing wii'. How many words start with the letter 'p' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a pouring picture with a bouquet of flowers in a window pane'. How many words start with the letter 'w' in the sentence.


Output: 2