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 counter topped with vases in front of a window'. How many words start with the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'chopped ingredients in little bowls lined up on a kitchen counter'. How many words start with the letter 'k' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'several motorcycles stand in a row facing an open street'. How many words start with the letter 'o' in the sentence.


Output: 1