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 couple of people that are playing wii'. How many words start with the letter 'p' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a close up of a dog standing on a rug'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a traffic light is at an intersection of a neighborhood'. How many words start with the letter 'n' in the sentence.


Output: 1