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 bus and a truck are pictured driving on a street'. How many words start with the letter 'a' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a tall zebra grazing on a lush green field'. How many words start with the letter 't' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'some big cattle are walking next to the beach'. How many words start with the letter 't' in the sentence.


Output: 2