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 cat lying on a desk with computers'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man using a laptop computer on a table'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'well established business near roadway in city area'. How many words start with the letter 'r' in the sentence.


Output: 1