Task: Program Execution
Input (English): 3, ['K', 'M', '9305', 'u', 'J', 'z', 'W', 'I', '6545', '8207', '4715', '7807', '1199', 'T', 'u', 'd', '3343', 'X', '7509']
Output (English): K, M, 9305