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 is laying on a keyboard in front of double monitors'. How many words start with the letter 'm' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man holding a baby two women and two cakes'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'two policemen are riding on horses which are standing still'. How many words start with the letter 'a' in the sentence.


Output: 2