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 skateboarder is performing a huge jump into the air'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a boy in an orange jacket holds a blue and white tennis racket'. How many words start with the letter 'w' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man surfs a small wave in the ocean'. How many words start with the letter 's' in the sentence.


Output: 2