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 wearing a straw hat and a black shirt'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a cat attentively watching a graphic on a television screen'. How many words start with the letter 't' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'two people walking under an umbrella towards a building'. How many words start with the letter 't' in the sentence.


Output: 2