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

Example Input: Sentence: 'sliced pizza served on plate next to beverage at table'. Replace the letter 'n' with 'y' in the sentence.
Example Output: sliced pizza served oy plate yext to beverage at table

Example Input: Sentence: 'a couple of giraffes eat some food out of a trey'. Replace the letter 'f' with 'e' in the sentence.
Example Output: a couple oe giraeees eat some eood out oe a trey

Example Input: Sentence: 'a elephant is in the water beside another elephant'. Replace the letter 'n' with 'o' in the sentence.
Example Output:
a elephaot is io the water beside aoother elephaot