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: 'this is a park with people flying kites'. How many words start with the letter 'p' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a small airplane sitting on top of a runway'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a wooden table topped with four books and a clock also a lamp'. How many words start with the letter 'a' in the sentence.


Output: 5