Given a sentence and an adjective, replace the adjective in the sentence with the given adjective and output the sentence.
She lives in a old house.
Adjective: modern
She lives in a modern house.
Complete the following task based on the instruction and optional input provided.### Instruction:
Given a sentence and an adjective, replace the adjective in the sentence with the given adjective and output the sentence.

### Input:
She lives in a old house.
Adjective: modern

### Output:
She lives in a modern house.