Task: Program Execution
Input (English): 8, 15, ['1623', '639', '941', 'X', '4497', 'L', 'W', 'U', '6943', '7875', '8031', '7015', 'F', 'c', 'Y', 'U', 'e', 't', 'c', '6133', '2615', 'u']
Output (English): Y, c, F, 7015, 8031, 7875, 6943, U