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.
--------
Question: Sentence: 'a traffic light indicating green for the bicycle lane'. How many words start with the letter 'g' in the sentence.

Answer: 1


Question: Sentence: 'a man without a shirt riding a skateboard'. How many words start with the letter 'r' in the sentence.

Answer: 1


Question: Sentence: 'a group of giraffes and zebras feeding and grazing in a grassy field'. How many words start with the letter 'g' in the sentence.

Answer:
4