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: 'unusual round vase with flower stems inside it'. How many words contain the letter 'c' in the sentence.
0

Sentence: 'a large bunch of green bananas on a tree'. How many words contain the letter 'a' in the sentence.
4