Task: Program Execution
Input (English): 18, 20, ['4855', 'K', '2469', '7617', 'L', 'O', '215', 'n', '3037', '9253', '2485', 'i', 'S', 'z', '9671', 'w', 'G', '2593', '1079', '233', '3995', '2123', 'U', '5157']
Output (English): 3905