TASK DEFINITION: In this task, you need to replace a letter in the sentence with another given letter.
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 rolling dough in the kitchen'. Replace the letter 'a' with 'e' in the sentence.

SOLUTION: e men rolling dough in the kitchen

PROBLEM: Sentence: 'several giraffes in thick green brush with a huge mountain in the background'. Replace the letter 'h' with 'f' in the sentence.

SOLUTION:
several giraffes in tfick green brusf witf a fuge mountain in tfe background