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 guy squatting down and tapping his food with a woman sitting down'. How many words start with the letter 'f' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a group of kites flying before a big blue sky'. How many words start with the letter 'b' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'several children playing baseball behind a metal fence'. How many words start with the letter 'm' in the sentence.


Output: 1