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 person on a court with a tennis racket'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a guy looks at a tablet and holds his skateboard while riding public transportation'. How many words start with the letter 'l' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a train engine sits at the edge of the train tracks'. How many words start with the letter 'e' in the sentence.


Output: 2