TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a boy is doing a trick with his skateboard'. How many words contain the letter 'y' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'two birds standing in the grass near each other'. How many words contain the letter 'i' in the sentence.

SOLUTION:
3