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: 'group of zebras and gazelles grazing on the grass'. How many words start with the letter 'g' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'three chefs talking to each other at a bar'. How many words start with the letter 't' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a young man wearing glasses with a tooth brush in his mouth'. How many words start with the letter 'b' in the sentence.


Output: 1