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 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: 'a clock tower in front of a dark sky'. How many words start with the letter 'f' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'there is a group of people with horses and a wagon'. How many words start with the letter 'a' in the sentence.


Output: 3