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

Example Input: Sentence: 'a man is on a bed with a cat and laptop computer'. Replace the letter 'e' with 'n' in the sentence.
Example Output: a man is on a bnd with a cat and laptop computnr

Example Input: Sentence: 'a person holding a small remote key chain'. Replace the letter 'n' with 'j' in the sentence.
Example Output: a persoj holdijg a small remote key chaij

Example Input: Sentence: 'a close up of a zebra foraging on some grass'. Replace the letter 'g' with 'x' in the sentence.
Example Output:
a close up of a zebra foraxinx on some xrass