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 group of dogs standing next to each other while on leashes'. How many words start with the letter 'o' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a group of people sitting at a restaurant table'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a herd of cattle laying next to a  large bush on top of grass'. How many words start with the letter 'a' in the sentence.


Output: 2