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: 'several boxes of glazed donuts on a desk'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'some signs and the roof of a train station'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a young girl brushes her neck and shoulders'. How many words start with the letter 'a' in the sentence.


Output: 2