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

Sentence: 'a woman standing in the dirt looking up at an elephant'. How many words contain the letter 'b' in the sentence.
0

Sentence: 'a line of very tall buildings next to a clock tower'. How many words contain the letter 'o' in the sentence.
4

Sentence: 'an intersection is vacant as an arch stands tall in the background'. How many words contain the letter 's' in the sentence.

4