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: 'the pigeons are walking around in the park around the benches'. How many words start with the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'hospital display of different bed setups and a nurses uniform'. How many words start with the letter 'd' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a calico kitty cat laying on top of several books on a bookshelf'. How many words start with the letter 'a' in the sentence.


Output: 2