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 statue holding a red umbrella in a pond'. How many words start with the letter 's' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'several friends are setting around a dinner table'. How many words start with the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a snowboarder in the middle of a jump with a mountain in the background'. How many words start with the letter 'a' in the sentence.


Output: 3