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 talks on the cellphone outside of a building'. How many words start with the letter 'o' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'man in winter clothes riding a snowboard on a gentle slope'. How many words start with the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a cat on a bed looking at a laptop'. How many words start with the letter 'a' in the sentence.


Output: 4