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: 'different cars on the streets in a city setting'. How many words start with the letter 'i' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man pulls a rolling suitcase and is wearing a suit'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a group of children getting autographs from baseball players'. How many words start with the letter 'a' in the sentence.


Output: 2