Task: Program Execution
Input (English): 12, 14, ['3783', '9391', '173', 'C', 'V', '1201', 'Z', '521', 'r', 'q', 'W', 'D', '5019', 'F', 'W', 'G', '1007', '2767', '475', '3319', '5385', '5029', 'f', '1523', '8239']
Output (English): D5019F