Corporate Syndicate Leaders

N employees are forming syndicates. Initially, each employee is their own syndicate. When two syndicates merge, the leader of the new syndicate is chosen based on size: the syndicate with more members absorbs the smaller one. If both have the same number of members, the one whose current leader's name is lexicographically smaller wins. Given a sequence of MERGE operations and LEADER queries, output the leader's name for each query. Input format: Line 1: N (number of employees), Q (number of operations). Next N lines: Names of employees 0 to N-1 (single words). Next Q lines: 'MERGE u v' or 'LEADER u'. Example: 3 2 Alice Bob Charlie MERGE 0 1 LEADER 1 Output: Alice