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 very cute white dog standing by a table with food'. How many words contain the letter 'o' in the sentence.

SOLUTION: 2

PROBLEM: Sentence: 'a herd of elephants walking down a street'. How many words contain the letter 'z' in the sentence.

SOLUTION:
0