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 yellow fire hydrant is placed in the grass'. How many words start with the letter 'i' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'while in a restaurant a young man is playing with his phone'. How many words start with the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a group of people by a fence and some giraffe'. How many words start with the letter 'a' in the sentence.


Output: 3