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

Example Input: Sentence: 'a person with a cell phone standing next to a train'. Replace the letter 's' with 't' in the sentence.
Example Output: a perton with a cell phone ttanding next to a train

Example Input: Sentence: 'a large bedroom with art over the bed'. Replace the letter 'r' with 'o' in the sentence.
Example Output: a laoge bedooom with aot oveo the bed

Example Input: Sentence: 'a fire hydrant and a rolled up fire hose'. Replace the letter 'd' with 's' in the sentence.
Example Output:
a fire hysrant ans a rolles up fire hose