In a certain code, 'GARB' is written as 'HEAR'. How will 'DROP' be written in that code?

Let's examine the shift logic for each letter in 'GARB' $\to$ 'HEAR' using alphabetical position values:
* $\text{G}(7)\to \text{H}(8)⟹+1$
* $\text{A}(1)\to \text{E}(5)⟹+4$
* $\text{R}(18)\to \text{A}(1)⟹-17$ or looking at reverse positions/vowels, let's look at numerical difference: $18\to 27(\text{A})⟹+9$
* $\text{B}(2)\to \text{R}(18)⟹+16$

Notice the shifting sequence values are squares of consecutive integers: $+1^2,+2^2,+3^2,+4^2$. Let's verify:

* $\text{G}(7)+1=8\to \text{H}$
* $\text{A}(1)+4=5\to \text{E}$
* $\text{R}(18)+9=27\equiv 1\to \text{A}$
* $\text{B}(2)+16=18\to \text{R}$

Applying the exact same square addition logic ($+1,+4,+9,+16$) to 'DROP':

* $\text{D}(4)+1=5\to \text{E}$
* $\text{R}(18)+4=22\to \text{V}$
* $\text{O}(15)+9=24\to \text{X}$
* $\text{P}(16)+16=32\equiv 32-26=6\to \text{F}$

Thus, 'DROP' becomes 'EVXF'.