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: 'car pass threw a green light in the day light'. How many words start with the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a bicycle on a road with a motor bike at the front'. How many words start with the letter 'b' in the sentence.


Output: 2