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 cake in the shape of a nurses hat written with the words congratulations danielle'. How many words start with the letter 'n' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man holding a white frisbee while standing on top of a  beach'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'man cutting through a cake in front of a group of people'. How many words start with the letter 'f' in the sentence.


Output: 1