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 living room with hd tv chair and decorations'. How many words start with the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a kitchen scene complete with a refrigerator sink and oven'. How many words start with the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'young boys in raincoats skate boarding on a half pipe'. How many words start with the letter 'r' in the sentence.


Output: 1