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 inside a window looking out near another cat'. How many words start with the letter 'n' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a cow that is standing in the grass'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a group of people standing around an elephant'. How many words start with the letter 'a' in the sentence.


Output: 3