In this task, you need to replace a letter in the sentence with another given letter.

Sentence: 'a person and a dog are on a bench'. Replace the letter 'e' with 'r' in the sentence.
a prrson and a dog arr on a brnch

Sentence: 'a big bowl of brown food halfway in a small oven'. Replace the letter 'v' with 'k' in the sentence.
a big bowl of brown food halfway in a small oken

Sentence: 'two tennis players holding racquets posing in front of a net'. Replace the letter 'o' with 'm' in the sentence.
twm tennis players hmlding racquets pmsing in frmnt mf a net