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 grey cat starring at a hand with a donut'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a take out sandwich and two bottles of soda'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a coffee cup on a table and an open laptop on a chair'. How many words start with the letter 'a' in the sentence.


Output: 5