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

Sentence: 'a picture of some horses and a person in the street'. How many words contain the letter 'r' in the sentence.
4

Sentence: 'man and woman wearing all red standing in a snowy field'. How many words contain the letter 'k' in the sentence.
0

Sentence: 'several bikes parked next to a white van'. How many words contain the letter 'b' in the sentence.

1