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 man with a tennis rack on a court'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'the zebra is walking through the tall brown grass'. How many words start with the letter 't' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a skateboarder tries to do a trick on the side of an art object'. How many words start with the letter 'a' in the sentence.


Output: 4


