TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a skier in the midst of a jump'. Replace the letter 'm' with 'd' in the sentence.

SOLUTION: a skier in the didst of a judp

PROBLEM: Sentence: 'a brown door  that says gentlemen and a toilet'. Replace the letter 'o' with 'f' in the sentence.

SOLUTION: a brfwn dffr  that says gentlemen and a tfilet

PROBLEM: Sentence: 'a man sitting on a couch with his shirt over his face'. Replace the letter 'm' with 'g' in the sentence.

SOLUTION:
a gan sitting on a couch with his shirt over his face