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: 'two people are passing a man playing a piano on the street'. Replace the letter 'o' with 'i' in the sentence.

SOLUTION: twi peiple are passing a man playing a piani in the street

PROBLEM: Sentence: 'two birds on a lichen covered rock against a cliff'. Replace the letter 'o' with 'k' in the sentence.

SOLUTION:
twk birds kn a lichen ckvered rkck against a cliff