Task: Program Execution
Input (English): 19, ['C', '551', '4147', '8745', '4939', 'J', 'b', 't', '6825', 'm', 'w', '2145', '6919', 't', 'k', '1667', '7673', 'b', 'c', 'I', '955', '4965', '1523', 'I', 'D', '7311', '8997', '2421', '6103', 'K', '8055', 'm', '2871', '5537', '2399', 'Q', '2695', 'b']
Output (English): C, I