In a certain code language, "FIGURE" is written as "GKUGSG" and "TRIPOD" is…

Concept

Coding-decoding items like this hide ONE fixed transformation rule that applies to every letter position; it must be recovered by comparing a word against its given code position by position, never assumed as a single uniform shift for the whole word.

Comparing FIGURE→GKUGSG and TRIPOD→UTPIPF position by position reveals the same rule in both: the 1st letter moves 1 place forward in the alphabet, the 2nd letter moves 2 places forward, the 3rd and 4th letters swap places with each other (no alphabet shift), the 5th letter moves 1 place forward, and the 6th letter moves 2 places forward.

Application

Applying this confirmed rule to LARGER, letter by letter:

1. 1st letter: L (12th letter) shifts 1 place forward → M (13th letter).

2. 2nd letter: A (1st letter) shifts 2 places forward → C (3rd letter).

3. 3rd and 4th letters: R and G swap places with each other (no shift) → G, R.

4. 5th letter: E (5th letter) shifts 1 place forward → F (6th letter).

5. 6th letter: R (18th letter) shifts 2 places forward → T (20th letter).

6. Reading the transformed letters in order gives M, C, G, R, F, T — so LARGER is coded as MCGRFT.

Cross-check

Re-applying the same five-step rule independently to TRIPOD confirms it holds — T shifts 1 place forward to U, R shifts 2 places forward to T, I and P swap places to give P, I, O shifts 1 place forward to P, and D shifts 2 places forward to F, reproducing UTPIPF exactly as stated in the question. This confirms the rule used above is consistent across both given examples, not a one-off coincidence, so MCGRFT is the correct code for LARGER.