TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a white bathroom with a stand alone sink and a shower curtain'. Replace the letter 'a' with 'm' in the sentence.

SOLUTION: m white bmthroom with m stmnd mlone sink mnd m shower curtmin

PROBLEM: Sentence: 'a bunch of signs on a pole on the street'. Replace the letter 'c' with 's' in the sentence.

SOLUTION: a bunsh of signs on a pole on the street

PROBLEM: Sentence: 'the runner leaps toward the base, as the baseman reaches for the ball'. Replace the letter 'e' with 'p' in the sentence.

SOLUTION:
thp runnpr lpaps toward thp basp, as thp baspman rpachps for thp ball