Task: Program Execution
Input (English): 21, ['3959', 'c', 'w', '3877', 'M', 'N', '7699', 'Z', 'Y', 'r', '2091', 'g', 'e', 'I', 'h', '4357', '9957', 'B', 'J', 'e', 'j', 'v', 'B', '4257', '4967', 'F', '5067', '5863', '1249', 'K', 'F', 'R', 'J', '5785', '7849', '9787', '61', 'o', '3573', '7779', 'x', 'a', '4419', '8693', '7873', 'B']
Output (English): 3959, v, 4419