Task: Program Execution
Input (English): 7, 9, ['4015', 'U', 'l', '7791', 'I', '437', '8153', 'z', '657', 'b', '4909', 'V', 'p', '6565', '5875', '4717', 'N', 'W', 'A', '7613', 'd', '5327']
Output (English): 657z8153