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

Sentence: 'a person snow skiing down a hill while the hold their ski poles'. Replace the letter 'r' with 'g' in the sentence.
a pegson snow skiing down a hill while the hold theig ski poles

Sentence: 'a gray elephant standing next to green bushes'. Replace the letter 'e' with 'o' in the sentence.
a gray olophant standing noxt to groon bushos

Sentence: 'a dog that is laying down in the mud'. Replace the letter 'd' with 'w' in the sentence.

a wog that is laying wown in the muw