Task: Program Execution
Input (English): 19, 21, ['A', 'R', 'Q', 'x', '9599', 'Q', '4577', '2745', 'U', '4479', '4111', 'e', '4287', '111', '8425', 'R', 'd', 'F', 'F', '1467', 'w', '9913', 'a']
Output (English): F1467w