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

Ex Input:
Sentence: 'a spacious bedroom with tidy bed and sofa with cushions'. Replace the letter 'n' with 'c' in the sentence.

Ex Output:
a spacious bedroom with tidy bed acd sofa with cushiocs


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: 'a grey and white cat sitting next to keyboard and computer monitor'. Replace the letter 'a' with 'n' in the sentence.

Ex Output:

n grey nnd white cnt sitting next to keybonrd nnd computer monitor