Explanation:

- In the given code language, each letter is assigned a number based on its position in the alphabet: A=1, B=2, ..., Z=26.

- The word "SNAKE" is calculated as follows: S(19) + N(14) + A(1) + K(11) + E(5) = 50. Typically, these would sum to another encoding, not directly translating as 15.

- However, a reduction or unique transformation could apply to make SNAKE = 15; it's not fully defined here.

- For "DONATION," the calculation is: D(4) + O(15) + N(14) + A(1) + T(20) + I(9) + O(15) + N(14) = 92.

- Without additional context on reducing or transforming 92, we seek logical transformations.

- Given options, Option 4: 18 could involve a reduction (e.g., 9 + 2 = 11; incorrect move).

The nature of the code transformation was poorly defined for a perfect match; your assumption might involve secondary reduction logic not written here.

; Option 3: 26 should arise from known transformations.