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 view of kitchen missing everything except the microwave and top cabinets'. How many words start with the letter 'e' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a person kneeling down under a green umbrella'. How many words start with the letter 'a' in the sentence.


Output: 2