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 bathroom sink with two large sinks under a mirror'. How many words start with the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'plates of different kind of food and a group of people on a picnic table'. How many words start with the letter 't' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a young child sits in an office chair at a work station'. How many words start with the letter 'o' in the sentence.


Output: 1