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 mirror reflecting a sink and bathtub'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man on a cell phone next to a woman'. How many words start with the letter 'n' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a black cat sleeping on some bags of carrots'. How many words start with the letter 'c' in the sentence.


Output: 2