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 bathroom with a toilet with a blue seat'. How many words start with the letter 'b' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a police car driving by a construction truck'. How many words start with the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a room with a table chairs and a doll in it'. How many words start with the letter 'w' in the sentence.


Output: 1