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 group of parked bikes sitting on the side of a road'. How many words start with the letter 'o' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a hotdog with onions on it is sitting on tinfoil'. How many words start with the letter 'o' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a guy looks at a tablet and holds his skateboard while riding public transportation'. How many words start with the letter 'l' in the sentence.


Output: 1