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

Input: Consider Input: Sentence: 'a person is waiting for a pizza to come out of an oven fired grill'. Replace the letter 's' with 'k' in the sentence.

Output: a perkon ik waiting for a pizza to come out of an oven fired grill

Input: Consider Input: Sentence: 'the person rides down the path atop the pink skateboard'. Replace the letter 'e' with 'c' in the sentence.

Output: thc pcrson ridcs down thc path atop thc pink skatcboard

Input: Consider Input: Sentence: 'people are taking a horseback ride along the beach as the waves roll in'. Replace the letter 'o' with 'x' in the sentence.
Output: pexple are taking a hxrseback ride alxng the beach as the waves rxll in