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

Example Input: Sentence: 'a plane getting ready to land on a runway'. Replace the letter 'n' with 'o' in the sentence.
Example Output: a plaoe gettiog ready to laod oo a ruoway

Example Input: Sentence: 'a crowd stands under a set of lights in the ceiling and one person holds up a cell phone'. Replace the letter 'r' with 'f' in the sentence.
Example Output: a cfowd stands undef a set of lights in the ceiling and one pefson holds up a cell phone

Example Input: Sentence: 'man standing in a yellow room holding some kind of remote'. Replace the letter 'n' with 't' in the sentence.
Example Output:
mat statditg it a yellow room holditg some kitd of remote