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: 'giraffe brought in ground next to some trees in exhibit'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'several white boats are anchored at a marina'. How many words start with the letter 's' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a guy is biking down the road while walking his dog'. How many words start with the letter 'd' in the sentence.


Output: 2