instruction:
In this task, you need to replace a letter in the sentence with another given letter.
question:
Sentence: 'a polar bear relaxing in a man-made pool'. Replace the letter 'r' with 'x' in the sentence.
answer:
a polax beax xelaxing in a man-made pool


question:
Sentence: 'a man swinging at a tennis with a racquet on a court'. Replace the letter 't' with 'c' in the sentence.
answer:
a man swinging ac a cennis wich a racquec on a courc


question:
Sentence: 'a women on her knees on a surfboard riding a wave'. Replace the letter 'i' with 'c' in the sentence.
answer:

a women on her knees on a surfboard rcdcng a wave