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 number of motorcycles are on display at a museum'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a young woman is posing on a wooden table'. How many words start with the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'man driving a fire truck with two women as passengers'. How many words start with the letter 'w' in the sentence.


Output: 2