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 cat sitting next to boxes of produce sitting in front of a store'. How many words start with the letter 's' 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: 'a man flying through the air while riding a skateboard'. How many words start with the letter 't' in the sentence.


Output: 2