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 train moves across a train crossing in a city'. How many words start with the letter 'c' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a horse pulling a carriage with people in the snow'. How many words start with the letter 'a' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a white cake decorated with flowers containing a slice of cake and a fork'. How many words start with the letter 'w' in the sentence.


Output: 2