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: 'two men are riding horses on a beach'. How many words start with the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a skateboarder is performing a huge jump into the air'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'two giraffes in some green grass and trees'. How many words start with the letter 'g' in the sentence.


Output: 3