Detailed Instructions: In this task, you need to replace a letter in the sentence with another given letter.
Q: Sentence: 'an airplane mounted on a pillar on display in a garden'. Replace the letter 'd' with 'g' in the sentence.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
an airplane mounteg on a pillar on gisplay in a gargen