This question evaluates proficiency with string-search data structures (such as tries) and traversal/encoding techniques for binary trees, testing competencies in efficient word matching, node encoding, and algorithmic manipulation in the Coding & Algorithms domain.
LeetCode 676. Implement Magic Dictionary
Determine and implement traversal/encoding that outputs nodes as 'cia' for the given skewed binary tree and similar examples.
https://leetcode.com/problems/implement-magic-dictionary/description/