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 batter lifts his left foot as he swings the bat'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'hospital display of different bed setups and a nurses uniform'. How many words start with the letter 'd' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a street sign and a tree in front of a brick wall'. How many words start with the letter 's' in the sentence.


Output: 2