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

Sentence: 'a toilet that is being worked on with its  seat removed'. Replace the letter 't' with 'p' in the sentence.
a poilep phap is being worked on wiph ips  seap removed

Sentence: 'a man is standing on a snowboard, atop a mountain'. Replace the letter 'd' with 'u' in the sentence.
a man is stanuing on a snowboaru, atop a mountain

Sentence: 'cross shaped shadow being cast on a laptop computer'. Replace the letter 'a' with 'v' in the sentence.

cross shvped shvdow being cvst on v lvptop computer