TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
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 police officers riding horses down the street'. Replace the letter 'o' with 'd' in the sentence.

SOLUTION: twd pdlice dfficers riding hdrses ddwn the street

PROBLEM: Sentence: 'a man and taller woman smiling at camera'. Replace the letter 'a' with 'x' in the sentence.

SOLUTION:
x mxn xnd txller womxn smiling xt cxmerx