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: 'an umbrella sitting on top of a hill next to a body of water'. Replace the letter 't' with 'b' in the sentence.
an umbrella sibbing on bop of a hill nexb bo a body of waber

Sentence: 'a stop sign with graffiti written on it'. Replace the letter 'f' with 'x' in the sentence.
a stop sign with graxxiti written on it