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 man holding onto a kite for a woman in the yard'. How many words start with the letter 'o' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a person with a hoodie on looking at a laptop'. How many words start with the letter 'l' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'an empty bench is on the curb side of a grassy area'. How many words start with the letter 'a' in the sentence.


Output: 3