Task: Program Execution
Input (English): 20, 20, ['b', 'H', 'W', 'I', 'p', '8255', '9667', 'C', 'w', 'P', 'x', 'v', '9423', 't', 'h', 'W', '7697', 'R', 'Z', '4981', '3171', 'o', 'Q', 'M']
Output (English): 4981