Task: Program Execution
Input (English): 15, ['b', '981', '7557', '9115', 'h', '517', 'j', 's', '4111', 'P', 'j', '4693', '4031', '8149', '6883', 'g', 'O', 'n', '905', 'L', 'D', 'O', 'd', 'f', '7221', '5481', 'O', '8451', '3263', '7197', 'Y', '9431', '5071', 'G', '7895', '8519', '5549', 'R']
Output (English): b, g, Y