TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a gray elephant standing next to green bushes'. Replace the letter 'e' with 'o' in the sentence.

SOLUTION: a gray olophant standing noxt to groon bushos

PROBLEM: Sentence: 'a batter is batting at a baseball game'. Replace the letter 'b' with 'e' in the sentence.

SOLUTION: a eatter is eatting at a easeeall game

PROBLEM: Sentence: 'a man is skateboarding down a street past a roadside tattoo shop'. Replace the letter 'm' with 'd' in the sentence.

SOLUTION:
a dan is skateboarding down a street past a roadside tattoo shop