Task: Program Execution
Input (English): 13, 21, ['7539', '189', '6671', 'I', '9479', 'C', 'h', 'q', 'H', '357', 'R', 'I', '967', '6461', '6253', '6381', '7157', '4493', '6371', 'A', 't', 's', 'C', '2357']
Output (English): tA637144937157638162536461967