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: 'montage color photograph of helmeted motorcycle riders and a rural fire station'. How many words start with the letter 'r' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man wearing glasses collecting samples in a container in a forest'. How many words start with the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'there is a man in the middle of the road'. How many words start with the letter 't' in the sentence.


Output: 3