Task: Program Execution
Input (English): 18, 18, ['Z', 'L', 'X', '7', 'z', 'A', '2489', 'q', '8539', 'K', 'e', '8255', '1929', '163', '9255', 'a', 'f', 'n', 'k', 'b', '9975', 'I', 'O', '5253', '1521']
Output (English): n