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

Sentence: 'there is a piece of a cake on the plate and a cup of drink'. Replace the letter 'r' with 'u' in the sentence.
theue is a piece of a cake on the plate and a cup of duink

Sentence: 'a woman sitting on a wooden chair holding a cat'. Replace the letter 'n' with 'q' in the sentence.
a womaq sittiqg oq a woodeq chair holdiqg a cat

Sentence: 'two persons in the room working with the mobile phones'. Replace the letter 's' with 'r' in the sentence.
two perronr in the room working with the mobile phoner