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 group gathering in which several people are holding frisbees'. How many words start with the letter 'g' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'three groups of yellow flowers in vases on table'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a sandwich with cheese and vegetables on a piece of plastic'. How many words start with the letter 'a' in the sentence.


Output: 3