TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a bathroom with a white toilet next to a large window'. Replace the letter 'w' with 'x' in the sentence.

SOLUTION: a bathroom xith a xhite toilet next to a large xindox

PROBLEM: Sentence: 'closeup of two teddy bears in red scarves and a brown teddy bear'. Replace the letter 'i' with 'y' in the sentence.

SOLUTION: closeup of two teddy bears yn red scarves and a brown teddy bear

PROBLEM: Sentence: 'a coffee mug sitting near a keyboard'. Replace the letter 'o' with 'i' in the sentence.

SOLUTION:
a ciffee mug sitting near a keybiard