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

Sentence: 'a gothic tower features a clock near a river'. How many words contain the letter 'e' in the sentence.
4

Sentence: 'a group of people standing together talking '. How many words contain the letter 'b' in the sentence.
0

Sentence: 'red locomotive pulling tanker cars in urban railroad crossing'. How many words contain the letter 's' in the sentence.

2