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 bathroom sink with two large sinks under a mirror'. How many words start with the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a blue brick building with a man leaning on it'. How many words start with the letter 'b' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'three kids sitting with presents and cake with a lot of books behind them'. How many words start with the letter 'w' in the sentence.


Output: 2