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: 'railway train passenger cars with graffiti parked on a gravel lot'. How many words start with the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a young man wearing glasses with a tooth brush in his mouth'. How many words start with the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a snowboarder is completely surrounded by white snow'. How many words start with the letter 'c' in the sentence.


Output: 1