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 man with baseball gear on holding a bat in his hands'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'the bright lights of the city by a street at night'. How many words start with the letter 'c' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'three trains at a train station on parallel tracks'. How many words start with the letter 'o' in the sentence.


Output: 1