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 four skiers are getting ready to embark'. How many words start with the letter 'g' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man who is holding some food near his mouth'. How many words start with the letter 'f' in the sentence.

Output: 1


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