TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a man on a horse in riding gear looking onward'. Replace the letter 'o' with 'h' in the sentence.

SOLUTION: a man hn a hhrse in riding gear lhhking hnward

PROBLEM: Sentence: 'a sad looking dog getting a bath in a sink'. Replace the letter 't' with 'c' in the sentence.

SOLUTION: a sad looking dog geccing a bach in a sink

PROBLEM: Sentence: 'a stop sign is near a large building and the sidewalk has a dusting of snow'. Replace the letter 'g' with 'd' in the sentence.

SOLUTION:
a stop sidn is near a larde buildind and the sidewalk has a dustind of snow