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 young girl wearing a pink tie and glasses'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'giraffe brought in ground next to some trees in exhibit'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'an old rusted street sign in front of a building'. How many words start with the letter 'o' in the sentence.


Output: 2