In this task, you need to count the number of words in a sentence that contain the given letter
--------
Question: Sentence: 'this is a yellow train riding the rails'. How many words contain the letter 'n' in the sentence.

Answer: 2

Question: Sentence: 'a woman standing on a beach near the water'. How many words contain the letter 'n' in the sentence.

Answer: 4

Question: Sentence: 'four hot dogs on a grill next to some hot dog buns'. How many words contain the letter 's' in the sentence.

Answer:
3