If WATER is written as YCVGT , then what is written as HKTG?

Key idea: Each letter is shifted forward by 2 positions in the alphabet when encoding.

• W -> Y

• A -> C

• T -> V

• E -> G

• R -> T

To decode HKTG, reverse the shift by moving each letter back by 2 positions:

• H -> F

• K -> I

• T -> R

• G -> E

Result: FIRE