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 vase filled with white flowers sitting on top of a wooden table'. How many words start with the letter 't' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a young man holding a tennis racquet and its case'. How many words start with the letter 'h' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'a female tennis player swinging a tennis racket at a ball'. How many words start with the letter 'a' in the sentence.
Output: 4