Task: Program Execution
Input (English): 4, 15, ['1971', '3239', '5265', 'g', 'c', '5589', 'V', 'q', 'p', 'z', 'G', '2037', 'B', '9147', '669', '2041', '9937', '2221', '5965', 'x', '2557', 'M', '3019', 'R']
Output (English): 6699147B2037GzpqV5589cg