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 guy preforming a skateboard trick at a skate park'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'the passengers are going up the step in to the plane'. How many words start with the letter 't' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a bathroom with a toilet and a sink'. How many words start with the letter 'a' in the sentence.


Output: 4