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 little boy that is sitting down with a phone'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a hydrant is sitting outside in the dirt'. How many words start with the letter 'i' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a smiling woman sits at a table with a pizza and salad'. How many words start with the letter 'a' in the sentence.


Output: 5