TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a group of small children sitting at a table in front of a pizza'. Replace the letter 'r' with 'd' in the sentence.

SOLUTION: a gdoup of small childden sitting at a table in fdont of a pizza

PROBLEM: Sentence: 'a teddy bear playing a drum and a teddy bear playing a guitar'. Replace the letter 'd' with 'm' in the sentence.

SOLUTION: a temmy bear playing a mrum anm a temmy bear playing a guitar

PROBLEM: Sentence: 'a man in a red shirt is playing a video game'. Replace the letter 'g' with 'a' in the sentence.

SOLUTION:
a man in a red shirt is playina a video aame