Question: In a certain code, \'COLD\' is written as \'DPEM\'. How is \'WARM\' written in that code?
Options:
Correct Answer: XBSN
Solution:
Each letter is shifted by +1. \'W\' -> \'X\', \'A\' -> \'B\', \'R\' -> \'S\', \'M\' -> \'N\'.