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: 'an electric train stands on the train tracks'. How many words start with the letter 't' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a car sitting on a train carriage on the tracks'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a hand holding up a  meat and sauce covered sandwich'. How many words start with the letter 'a' in the sentence.


Output: 3