Task: Program Execution
Input (English): 6, 17, ['8461', 'W', '5779', '7069', '649', 'x', '5735', '6455', '6957', 'u', 'q', '1029', '7077', 'z', '5559', 'g', '4637', '6775', 'U', 'a']
Output (English): x573564556957uq10297077z5559g4637