TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'street signs hanging next to a traffic light on a city street'. Replace the letter 'g' with 'm' in the sentence.

SOLUTION: street simns hanminm next to a traffic limht on a city street

PROBLEM: Sentence: 'a clean, sterile bathroom with a shower, toilet, and sink'. Replace the letter 'n' with 'k' in the sentence.

SOLUTION: a cleak, sterile bathroom with a shower, toilet, akd sikk

PROBLEM: Sentence: 'an older red airplane is going straight up'. Replace the letter 'h' with 'z' in the sentence.

SOLUTION:
an older red airplane is going straigzt up