Task: Program Execution
Input (English): 17, 18, ['5249', '2001', '4357', 'B', '4941', '3829', '5633', 'n', 'g', '1051', 't', '6093', 'j', '7275', '7935', '4659', 'H', 'L', '1831', 'H', '6525', '7199', '1665', 'X', 'p']
Output (English): LH