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 silver blue and red jet is flying over a fence'. How many words start with the letter 'f' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'three hot dogs are stuffed in buns are ready to serve'. How many words start with the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'the young hipsters dig into a plate of food as a black man points towards the sky'. How many words start with the letter 's' in the sentence.


Output: 1