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

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 group of people are using their laptops in the dark'. Replace the letter 'p' with 'b' in the sentence.
a groub of beoble are using their labtobs in the dark

Sentence: 'a toilet with a monitoring device attached to the seat'. Replace the letter 't' with 'x' in the sentence.
a xoilex wixh a monixoring device axxached xo xhe seax