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 skateboarder performing tricks under the lights at night'. How many words start with the letter 'u' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a colorful sculpture of an elephant in a park'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'an old man in a dress about to hit a tennis ball'. How many words start with the letter 'a' in the sentence.


Output: 4