TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'two children who are standing next to a white fire hydrant'. Replace the letter 't' with 'r' in the sentence.

SOLUTION: rwo children who are sranding nexr ro a whire fire hydranr

PROBLEM: Sentence: 'a city street with cars and busses near buildings'. Replace the letter 'e' with 'd' in the sentence.

SOLUTION: a city strddt with cars and bussds ndar buildings

PROBLEM: Sentence: 'an open toilet lid in a nicely decorated bathroom'. Replace the letter 'c' with 'l' in the sentence.

SOLUTION:
an open toilet lid in a nilely delorated bathroom