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

Sentence: 'a living room with an orange couch and green decorations'. Replace the letter 'c' with 'm' in the sentence.
a living room with an orange moumh and green demorations

Sentence: 'a group of giraffe standing on top of a dirt field'. Replace the letter 'a' with 'y' in the sentence.
y group of giryffe stynding on top of y dirt field

Sentence: 'a yellow fire hydrant on a snow covered street'. Replace the letter 'r' with 'd' in the sentence.

a yellow fide hyddant on a snow coveded stdeet