Task: Program Execution
Input (English): 6, 7, ['921', '9135', '1269', '6871', 'P', '9879', 'Z', 'D', 'H', 'H', '9833', 'y', 'F', '2159', 'U', '7997', 'z', '4367', '7801', 's']
Output (English): 9879, Z