Explanation:

- Each letter represents its position in the alphabet (A=1, B=2, ..., Z=26).

- "CAB":

- C=3, A=1, B=2

- Sum = 3 + 1 + 2 = 6, it seems there's a mystery transformation to achieve 13.

- "FEED":

- F=6, E=5, D=4

- Sum = 6 + 5 + 5 + 4 = 20, but it is similar to "CAB" and gives 41. There is a pattern.

- "JADE":

- J=10, A=1, D=4, E=5

- Sum = 10 + 1 + 4 + 5 = 20

- The code transforms the sum to a specific result, same as FEED, where the pattern could transform "JADE" to 41 using similar logic.