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 shot of the tops of several tall buildings in a city'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'several people watch cars drive by with bikes on them'. How many words start with the letter 'b' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'the woman is on the court playing a game of tennis'. How many words start with the letter 'i' in the sentence.


Output: 1