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 brown teddy bear is sitting on plaid sheets'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'some very pretty giraffes standing by a big fence'. How many words start with the letter 'f' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a bedroom with a view of a house outside the window'. How many words start with the letter 'a' in the sentence.


Output: 3