Task: Program Execution
Input (English): 20, 20, ['c', '8153', '4681', 'a', 'g', '8141', '8619', 'h', '8913', '8615', 'A', '717', '8919', '9293', '6709', 'c', '405', 'h', 'A', 'H']
Output (English): H