In this task, you need to replace a letter in the sentence with another given letter.

[EX Q]: Sentence: 'a polar bear relaxing in a man-made pool'. Replace the letter 'r' with 'x' in the sentence.
[EX A]: a polax beax xelaxing in a man-made pool

[EX Q]: Sentence: 'a close shot of a stop sign near a building'. Replace the letter 'b' with 'u' in the sentence.
[EX A]: a close shot of a stop sign near a uuilding

[EX Q]: Sentence: 'a vase with a bouquet of white and pink flowers'. Replace the letter 'r' with 'd' in the sentence.
[EX A]:
a vase with a bouquet of white and pink floweds