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 fighter jet on a runway with a cover over the cockpit'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'woman riding on the back of a horse inside a building'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'fruit seller at stand showing hanging bananas and balance scale'. How many words start with the letter 's' in the sentence.


Output: 4