Task: Program Execution
Input (English): 12, 14, ['7369', '2893', '243', '8723', 'y', '3979', '3573', 'h', 'h', '7467', '611', '2137', 'v', '3549', '2921', 'd', '2113', '5859', 'x']
Output (English): 2137v3549