Task: Program Execution
Input (English): 3, 14, ['C', '999', 'O', 'o', '1021', '7945', '5437', '7237', 'w', '6535', '1853', '4091', 'A', 'B', '2071', 'o', '721', 'O', '7573', 'f', 'u', '3329', 'B', 'K']
Output (English): Oo1021794554377237w653518534091AB