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: 'dog playing frisbee on the beach with ocean in background'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man putting a protective covering over a large tv screen'. How many words start with the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a sandwich and a cup on a table'. How many words start with the letter 'a' in the sentence.


Output: 4