Task: Program Execution
Input (English): 5, 8, ['7157', 'U', 'E', '9999', 'i', '3287', 'a', 'x', 'T', '8663', '4257', 'F', 'N', '5803', '1469', 'H', '6635', '5645', 'd', '2265']
Output (English): xa7823i