In this task, you need to count the number of words in a sentence that contain the given letter

Sentence: 'a fresh flower on a table in a piture of water'. How many words contain the letter 'n' in the sentence.
2

Sentence: 'snow boarder in midflight inverted with a steep snowy slope in the background'. How many words contain the letter 'j' in the sentence.
0

Sentence: 'a stop sign in front of railroad tracks'. How many words contain the letter 'b' in the sentence.

0