Task: Program Execution
Input (English): 15, 18, ['8643', 'x', 'j', 'G', '9745', '4989', '4217', 'c', 'p', 'z', 'K', 'F', 'm', 'a', '5879', '251', 'P', 'S', 'S', 'k']
Output (English): 5879251PS