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

Ex Input:
Sentence: 'a person and a dog are on a bench'. Replace the letter 'e' with 'r' in the sentence.

Ex Output:
a prrson and a dog arr on a brnch

Ex Input:
Sentence: 'two parrots on a tree next to a metal pan'. Replace the letter 'w' with 'j' in the sentence.

Ex Output:
tjo parrots on a tree next to a metal pan

Ex Input:
Sentence: 'traffic lights and people walking as other on a crane continue with their work'. Replace the letter 'e' with 'a' in the sentence.

Ex Output:
traffic lights and paopla walking as othar on a crana continua with thair work