In this task, you need to count the number of words in a sentence that contain the given letter
--------
Question: Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.

Answer: 3


Question: Sentence: 'an asian man ad woman on their cell phones'. How many words contain the letter 'i' in the sentence.

Answer: 2


Question: Sentence: 'a brown grassy field filled with sheep and a horse'. How many words contain the letter 's' in the sentence.

Answer:
3