TASK DEFINITION: In this task, you need to count the number of words in a sentence that contain the given letter
PROBLEM: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.

SOLUTION: 1

PROBLEM: Sentence: 'several people and a dog riding on a small boat'. How many words contain the letter 'l' in the sentence.

SOLUTION: 3

PROBLEM: Sentence: 'this is a nice area to rest in as the sun goes down'. How many words contain the letter 'o' in the sentence.

SOLUTION:
3