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 bus is parked on the side of a road in front of a building'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a small airplane sitting on top of a runway'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'the person is holding a pair of green colored scissors'. How many words start with the letter 'h' in the sentence.


Output: 1