Task: Program Execution
Input (English): 12, 15, ['4557', 'A', 'X', '2345', '2451', '3237', 'o', 'C', '1181', '3245', 'L', 'C', '6399', 'V', 'P', '4125', '981', '6813', 'k']
Output (English): 6399