Task: Program Execution
Input (English): 2, 6, ['B', '6613', 'X', '3981', 'u', 'H', '8125', '6999', 'g', 'N', 'j', 'h', 'b', 'T', 'O', 'D', '4155', 'A']
Output (English): 6613, 6999, T