TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a chinese entree displayed on a red plate'. Replace the letter 'n' with 'z' in the sentence.

SOLUTION: a chizese eztree displayed oz a red plate

PROBLEM: Sentence: 'two parrots on a tree next to a metal pan'. Replace the letter 'w' with 'j' in the sentence.

SOLUTION: tjo parrots on a tree next to a metal pan

PROBLEM: Sentence: 'people are walking on the cement between two trains'. Replace the letter 'e' with 'c' in the sentence.

SOLUTION:
pcoplc arc walking on thc ccmcnt bctwccn two trains