TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
PROBLEM: Sentence: 'a woman holding a tennis racket getting ready to hit a tennis ball'. Replace the letter 'r' with 'l' in the sentence.

SOLUTION: a woman holding a tennis lacket getting leady to hit a tennis ball

PROBLEM: Sentence: 'a busy intersection with cars moving at night'. Replace the letter 's' with 'f' in the sentence.

SOLUTION: a bufy interfection with carf moving at night

PROBLEM: Sentence: 'an old town street with people walking around, horse drawn carriages, and early cars'. Replace the letter 'e' with 'x' in the sentence.

SOLUTION:
an old town strxxt with pxoplx walking around, horsx drawn carriagxs, and xarly cars