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

Sentence: 'a big sign that is lit up near some buildings'. How many words contain the letter 'r' in the sentence.
1

Sentence: 'a group of giraffes walk across an open area'. How many words contain the letter 'm' in the sentence.
0

Sentence: 'snow boarder doing jump in front of snow trees and houses'. How many words contain the letter 'j' in the sentence.

1