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: 'a open fridge that has different items inside of it'. How many words start with the letter 'i' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a train track runs into the distance while a women sitting beneath an umbrella rests nearby'. How many words start with the letter 'r' in the sentence.


Output: 2