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 person is sitting in the grass on a motorcycle'. How many words start with the letter 'i' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a passanger train is coming down the tracks'. How many words start with the letter 't' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a classic car is stopped at the red light'. How many words start with the letter 'c' in the sentence.


Output: 2