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: 'zebras and antelopes in a field of dried grass'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'two uncooked pizzas sit on a wooden table'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'tho city buses on a street one with its engine showing'. How many words start with the letter 's' in the sentence.


Output: 2