Task: Program Execution
Input (English): 9, ['S', 'r', '8943', 'm', '1621', '7715', 'U', 'u', 'S', 'Z', '5003', '4339', 'b', '2515', '1411', '9745', '8617', '1457', 'P', '479', '7103', '1825', '8023', '9765', '9347']
Output (English): S, Z, P