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 man and luggage carts outside of an airplane'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a kitchen with a sink and a dish rack'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a child sitting at a table in a chair next to a plate of food'. How many words start with the letter 'a' in the sentence.


Output: 5