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 woman is holding the hand of a boy who is leaning on a fire hydrant'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a bird is drinking out of a red dish'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a large boxed game controller on a bed'. How many words start with the letter 'a' in the sentence.


Output: 2