Task: Program Execution
Input (English): 8, 21, ['5887', '957', 'j', '9985', 'q', 'G', 'U', 'x', 'D', 'j', '9937', '7325', 'U', 'C', '137', '9983', '9315', '9043', '7997', '8445', 'S', 'F', '6363', 'y', 'Y', 'Y']
Output (English): S54487997340951393899731CU52377399jDx