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 boats floating in the ocean next to a dirty walkway'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'this grizzly bear is standing in some shallow water'. How many words start with the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'people board a bus that has bags tied to the top'. How many words start with the letter 'b' in the sentence.


Output: 3