Task: Program Execution
Input (English): 5, 20, ['8881', 'y', 'C', '1983', 'U', '4637', 'G', 'v', 'M', '8349', 'r', '7889', '3129', '861', '2777', '3071', 'v', 'f', 'W', '285', 'R', '5373']
Output (English): 285Wfv3071277786131297889r8349MvG4637U