Task: Program Execution
Input (English): 3, ['1891', 'a', 'd', 'J', 'I', '961', 'n', '9461', '7721', '9515', '2909', '3055', '6923', '6355', 'F', 'U', 'E', '7213', '4591']
Output (English): 1891, a, d