Task: Program Execution
Input (English): 15, 18, ['1181', '3967', '4159', '945', 'O', '6323', 's', '5635', 'x', '1381', '695', '1749', 'c', '1695', 'e', '5287', '6849', 'u', 'N', '487', '6715', 'N']
Output (English): u, 6849, 5287, e