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 vase filled with white flowers sitting on top of a wooden table'. How many words start with the letter 't' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a man at a picnic table with a dog drinking from a bottle of milk'. How many words start with the letter 'd' in the sentence.


Output: 2